Great stove. Definitely better than msr whisperlite in terms of performance. Heat output is excellent. It has a wide range of output and simmers beautifully!. Additionally, what is great about this stove is its ability to be shut off, maintain pressure for a very long time (an hour in my case), and then to be able to relight easily without additional pumping. that's nice when you want your meal, and then coffee or tea later...support is excellent. soot was zero. No messy soot to deal with as compared to whisperlites (which always end up getting soot on bottom and then YOU). Folds up nicely. Light weight. Quality manufacturing (except see note below).
Lighting of stove DOES requiring priming...it's just very different than other white gas stoves. Requires lots of pumping to light, but overall performance is outstanding.
The only reason i didn't give it 5 stars is because its still not quite better than my old svea 123 coupled with the sigg tourist stacking aluminum cook set. otherwise, i'd give it a 5. Better than msr whisperlite (quality of manufacturing is definitely better too. Optimus Nova is also another great stove (especially for cold weather or international travel) that's worth looking at if you want a great liquid fuel stove, and want to be able to simmer (which msr whisperlite or simmerlites don't really do). 1st choice in stove - snowpeak wg, 2nd, optimus nova but only because its heavy(note: nova better than nova+), and msr whisperlite for outrageously bullet proof dependability.
Note: Had trouble in Alaska trip where fuel would not shut off. Created VERY dangerous situation, with fuel spirting everywhere. Manufacturer replaced valve.