Mine required somewhat regular shots of Roundup on the weeds and grass that popped up. Not exactly high maintenance but one more thing to do.

I once had a brick paver patio that had brushed sand in between the bricks and after a period of time you will begin to get weeds growing up between the pavers. Round-up or pulling them doesn't take much effort, but just don't let it go too long. Once I left it unattended for several months and the weeds got large and numerous. That took quite a bit of effort to pull all those weeds from the cracks.

Riles

I have two tumbled paver patios, one 3 years old, one 2 years old. We will get the occasional weed, and in shady areas, moss may grow, which IMO adds to the ambience of the tumbled look. Ours has sand over the top. They are very low maintenance, but we are not fussy. I know people who power wash theirs several times per year, so I guess the maintenance depends on how fussy you want to be.

Under all circumstances, it is much less maintenance than my old pressure treated deck.

A huge agreement with iinsic!

I like the moss in spots and about a million times easier than our old crappy high maintenance (time and money) deck.

I haven't powerwashed yet but it's only going on it's 3rd summer. Doesn't look to me as if I need to do it this year either and I'm fairly fussy.

Burn them out with a propane torch.
Quick, easy, and no chemicals to hang around.

Use vinegar on the weeds. It's natural, it's cheap and it breaks down quickly.
I have several hunded feet of sand-laid brick sidewalks and I use vinegar. IMHO - Round-up is too tricky to use around ornamentals and bedding plants.
Jim

Thanks for the replies & suggestions. DH wanted concrete but I'm going with pavers. I hope I don't hear "I told you so".