We have the 2007 version of the Gagg Combi-steam oven & GE Monogram Advantium 240 wall oven (not the 120). We don't have them in the same stack because each manufacturer required its unit at countertop height or above, so one of them would either be too high or void the warranty. Having the Gagg Combi (plumbed version) installed at or above countertop height is required if the drain hose will be connected to a sink drain, since it uses gravity to drain. Our Advantium 240 requires an install above the countertop for its warranty but doesn't say why. Your best bet is to check the installation manual for the Advantium 120 to see if you can install it below countertop height. Or if you can drain the Gagg Combi thru the floor to a drain, then the height requirement would not apply to it. (We ended up running our drain through the floor, because a sink was too far away, so I know it works. We didn't stack it with our Advantium because by then we chose to stack the Combi over a Gagg convection oven.) Or get the unplumbed Combi, but having it plumbed is so worth it for its excellent performance.

Glad I could help. GW is such a great source of info, so I am happy to have something to contribute. I would not have even known about the combi-steam if it weren't for GW, and now I can't wait until it is hooked up.

My OTR Adv 240 is vented out. The fan is pretty loud, even on Low, but it does a good job of venting steam and cooking fumes. IMO the Adv must be vented outside for the speedcook/broil feature of this appliance, which creates a lot of heat and smoke inside the oven. I cook filet mignon, pork chops, etc. in it and hardly use my gas outdoor grill anymore, except for large parties. If you can't vent out, due to your kitchen cabinet configuration or whatever, I would strongly suggest that you just get a new microwave without the Adv features.

After about a year of planning and deliberation, here's the final line up! Bluestar 48" rangetop w 24" griddle Bluestar French door, new electric wall oven Wolf M Series combi-steam Wolf Warming drawer Kitchen-Aid 30" convection microwave 36" SubZero built-in french door 24" SZ beverage center 15" SZ Ice maker 24" Bosch Benchmark DW 18" Bosch 800 Series DW How I decided on the Wolf combi-steam: I went to see both the Wolf and Miele units in person. I narrowed it down to those two based on Wolf's looks and Miele's plumbing. I knew that the Miele and Gagg were both plumbed but I didn't give enough weight to the fact that Miele doesn't have a drain. When I saw the Miele in person, I realized that emptying and cleaning the tray was really what I thought I was going to avoid by getting the plumbed unit but in fact that was not the case. The Wolf doesn't have a broiler, but I've got one stacked above it in the BlueStar and am not bothered at the thought of moving from one oven to the other. I also have the Searzall + Blowtorch, so I won't be at a loss for browned, melted goodness. The one thing I still long for is Miele's M touch operating system. The menus were so clear and thoughtfully designed. The Masterchef feature looked like a dream, for both an experienced cook like myself and for those who don't like to cook at all. Alas, I can't have it all. I'm sure I'll find my way with the Wolf. The microwave was decided purely by looks. I had planned on buying a unit from one of the main manufacturers (Sharp or Panasonic) but the Kitchen-Aid was the best looking, by far, with the rest of the new pro-style appliances and their handles. I also really loved the button panel across the bottom, the fact that it still has a number pad (as opposed to a dial or the other newfangled styles), and that it has a pull door, as opposed to a push button (one of my inexplicable pet peeves.) There's also a popcorn addict in the house and we're very intrigued by their popcorn popping technology. Something about how it recognizes when it's done the same way we would, when the pops slow down to 1-2 seconds apart. I have to tell you, it was so nice to write all of that without a tinge of doubt. I know I did as much research as I could, asked all the questions and am going to get the kitchen of my dreams. I hope you do too!