At 6.7 ounces, plus what a stove weighs, you're damn near to a Jetboil.
A pocket rocket weighs a hair over 3 oz. which means a pretty lightweight package overall. But for me, weight isn't the issue here. Since I already have a pocket rocket, adding this is an economical alternative to buying a whole new setup with the Jetboil.
If it gets me better gas mileage from a canister it would be worth it on longer trips IMO.
Right now I can get about 4 days from an 8oz canister of Isobutane with the PR, which allows for some simmering and some continuous burn like when making pancakes one at a time. That's without wind to contend with.
Just heating water for Mountain House or coffee isn't a big deal, especially for overnighters. I'd stick to the PR and my Snowpeak titanium cup. But for multi day trips, it could mean the difference of a cold meal being out of gas, and a hot one! Or having to take an extra canister just in case.
