I agree with you there. On the grilldome, I've gotten a 1 hour leq 1/4 cook at 350*, one steak cook at a whopping really hot temp, one porkchop cook, and I think one more cook (hamburgers I think) out of one load of royal oak, plus about 1 handfull added each time for lighting it. Works great. Just shut the vents and it goes right out.
I have used mesquite chips once on the hamburgers, and it seems easy to over do it with the smoke if you are not a bit more careful, but other than that it works great.
I measured mine the other night, it's the medium grilldome for $499 I think. I picked it up for $50 on craigslist. Would definitely recommend one, but only if you have money to blow, or you find one cheap like I did.
Like others said, biggest drawback after price is size. Also, it doesn't come with all the things needed for a low and slow cook, which is why I haven't tried it yet.