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It looks fine in the photo but tans can have odd undertones depending on your light and space. Do you have a sample to make sure it works with your existing floor and wall color? I would also look at porcelain slate. It is a timeless neutral floor.

I just love slate in a sunroom...(actually, I love it anywhere) it's both warm and cool and goes with just about everything...

What d said about the undertones and slate. I chose a tan/ off white tile for my bathroom that I thought looked great until I got it down on the floor and it turned out to be the dreaded pinky beige. Surprise. Compare your sample to something yellow to see if it looks pinkish in comparison before you decide.

The tile you linked to has "pressed edges"...which means you will have wide grout lines...probably 1/4 inch. Please have someone at a tile store explain the difference between pressed edges and a rectified tile.

A friend of mine (previous neighborhood) installed slate in her new sunroom. When I was renovating here, I was going to use slate, but my friend advised against it -- real slate is slightly uneven, and she had the best around, including an architect, on her project.

I went with a grey porcelain in 12x24 format that is truly grey/white and not beige/pink. My sunroom is long and narrow, but the size format worked out great.

I used StonePeak Classic 'Bardiglietto' http://www.besttile.com/Tile-Collection.aspx?pid=438&cid=28

One of the beauties of slate is that it's uneven. I love it in my foyer.

I had slate in my kitchen, laundry room, powder room, center hall, pantry and foyer in my last house. It was uneven, but easy to care for, except for cleaning the grout periodically, which was a pain.

I believe the first few comments were speaking of a porcelain tile that mimics slate...not natural slate. You can purchase natural slate that has a honed (smooth) finish but expect to pay $$$ for it.
Samples are samples, they do not give you the actual coloring of the product you're looking at. If you want to be accurate it would be wise to have the company to note which dye lot they are ordering from (if available)..because dye lot to dye lot will vary with undertones. If they are unable to give you the dye lot, request that they bring in a box as samples. Some companies as myself can do this, most can't. The box will state what dye lot it is. If it works..great! If not, there might be other dye lots you can have brought in of that product.
Natural stone will always have natural variation, so expect coloring to differ box to box.

My husband installed natural slate in our laundry room and said never again. Whatever we picked from HD flaked and chipped and drove him crazy. It looks great but some versions of natural slate can be problematic which is why I always suggest porcelain slate.

I have brick in my "breakfast room" -- it's really tile but made with the same material as brick only its just the thickness of tile. It's a really good product -- 10 years old and everyone thinks it's real brick.

Oh, and I have wood floors and it looks good with the wood.

Those are called brick pavers. Usually 3/8" to 1/2" thick. There's also porcelain tiles that mimic brick. These are great sellers here in the south.

Any particular brand? I'm having a hard time finding them.

Have you factored in what the noise level is going to be like in an all-glass room with a cathedral ceiling and tile floor? You will have an acoustic echo chamber.

Well there will be an area rug and furniture if that helps. Good thing to keep in mind!

Here's a link. I also think slate is a beautiful option for a sunroom, especially next to hardwoods. http://www.portstone.com/

20 x 20 sounds just fine. I would not do slate, tends to be dark and the whole idea is to enjoy the light and brightness of the room. Also, do a straight lay. Keep it clean and simple. Good Luck!

@ecasta, if you were asking me for a brand of brick pavers...
I use Alpha Concrete. Click HERE to visit their website.
They are based in Oklahoma and there will be freight involved. These are the best pavers we have worked with.

I had a Vermont multi-size/color slate floor in my kitchen in the dorm apt in Maine. We bought the slate at Lowe's in Portland - it was about $1 per sq ft at that time. I have never liked a kitchen floor as much as I did that slate floor! With the multi-color/size tiles, it did not appear terribly dark. It was wonderful when the dogs (or my husband) came in with snow on all their paws (I had 5 dogs at one time up there, plus the "big dog" - i.e. my husband). It just dried and that was it.

Once a year, my husband washed and sealed the floor. Other than that, I just used a broom on it.

I have a sun porch and if the slab had not cracked at some time over the years, cracking the brick on top, I would put Vermont slate down in a heartbeat. I just can't deal with trying to level the slab on a 70 yr old house, and the slate will crack if I don't.

If you don't care for multi-color, go with a natural green slate - it's a very pretty color. I like my sun porch to have flooring where I need not worry about water. I bring in many, many plants to winter over on the porch, and I have a spigot and coil garden hose to water all these, and I need to allow the water to come out the bottom of the pots (no saucers - pots too large). Slate would work very well.

I vote for a brick look. I think brick is very classic in the south, and never goes old, imo. You will have more grout, however, so do seal it periodically.

We just ripped out faux slate (looked awful with the sandstone house exterior) and put in large porcelain tiles. 18" x 24" laid running brick, 1/3-1/3-1/3. Wasn't grouted yet in this photo.

I don't have the time to read all the responses but wanted to kick in with one piece of advice: think very, very hard about a tile with pitting, especially light to medium toned tiles like the one you posted. Guess where all the grime is going to settle? A mop does not get it clean. We inherited pitted tile in a tiny bathroom and I was on my hands and knees with a brush and bleach going after it when we moved in. Unless you have a Downton Abbey staff on hand I'd run from any tile with that texture.

I'd be partial to a herringbone brick pattern....can't miss with that one.