There is ten Genesis grills to every Q grill in use today. That is probably the biggest reason. The Q is a very simple grill....Which I consider to be a big plus. They don't present a lot of problems and other than the grates, they are very durable.
I have two "boomerang" Q200's that just showed up in my yard since my kids are both between lodging.
I will, of course, have to run them through some QC checks! I echo Bruce's comments above. About the only issue that seems to be recurring with the Q is the lack of longevity in the regulator (and the cost to replace them).....of course, doing the 20lb tank swap can fix that cheaper (though with less portability.)
I do think the Weber Q series are still a bit of well-kept secret. I used to look at them and think, "Nice toy for camping or picnic, but why would I really want to grill on one of those?" Then I got an old Q 200 from our organization's thrift store for ten or 15 bucks.
I cleaned it up...
And gave it a try:
Wow! I couldn't believe what an effective - and easy to use and clean - this Q turned out to be. Like Bruce says, its simplicity is a big strong point, yet don't think it can't do a GREAT job. And, if you go with the big Q3200 you have almost as much grilling space as a Genesis 300 series grill. Not for low and slow (at least in my book) but a very appealing option for regular grilling. If you also like charcoal, try to find a CharQ. You will love it!
Absolutely love my Q1200. Got it as a portable/tailgating grill and ended up selling my Genesis and the Q is my only home gas grill now. Gets very hot for a great sear and I've even used it on low with a baking sheet and grill rack for more of an "indirect" type cook. It's a damn workhorse.
Two nights ago, steaks, baked potatoes, and corn on the cob.
I have a 22+ year old WSM, a newish Weber kettle, and an ancient ex-wife-dumpster-dive smokey joe. But, it's the little floor-model Q I talked a home depot manager into selling me for half price that has by far and away seen the most cooks. I got a regulator to hook up full size tanks, and it sits on my deck year-round. Whenever it snows the last order of business is shoveling out a spot to the Q. It is ready and willing 365 days a year; rain, shine, or snow... and when I do grill or barbecue with charcoal it makes that experience just a little more special.
My 3200 gets used all year round. It’s great when I don’t have time to light the charcoal on my kettle grill. As said simple design, easy to use. I am on my 2nd set of grates. Grill is 7 or 8 years old.