They aren't the lightest but definitely a stove you can count on every time.
My first experience with one of these was waiting in line for an application for a job as a Firefighter. A group of us had started networking and applying for several departments after we graduated from our Fire academy. Seems a few departments were doing a joint recruit and only one application was needed to apply to several departments at one time. Only bummer was that only 1000 applications were going to be given out at 0900 Monday morning. We got in line Friday afternoon and there were already a couple of hundred people in front of us. We spent the weekend sitting in line waiting. One night it started raining. There we were, cold, damp, and somewhat miserable. One of the guys in our group fired up a stove and proceeded to start making hot chocolate and coffee. It happened to be one of these MSR Whisperlite stoves. It totally changed the crappy evening and mood that night. I never forgot that. Seems like not so long ago but that was 25 years ago now. Time flies. Great memories...