Hey, I have a lot of stoves (don't get my wife going!) and for most things, I like my Reactor the best. It's so fast it's unbelievable- hmmm, I'd like a cup of coffee. Add enough water and wham, it's done. It seems vastly more fuel efficient than any other canister stoves, which sorta brings the weight down, since you carry lessw fuel. I've used it in below freezing temps, in strong wind, and in my vestibule, and it just rocks. Oh, and it's really hard to spill, try that with a Pocket Rocket!
Since I do a lot of solo trips, the extra weight (maybe half a pound if you compare it to the lightest pot, stove, windscreen and pot grabber combo) seem worth it for fast efficient boilage. I put it in my bear can after a few days, when there's room.
What I wouldn't choose it for: a one-nighter in balmy conditions (alcohol!) or a 2 week large group expedition.