I bought the Brunton Flex because it had more and wider pot supports and a tighter spring-loaded sleeve to hold the burner upright. No more burner wobble as has been reported with the Crux. I put a tiny bit of motor oil on the sleeve to keep it from galling and wearing. I want it to stay tight. Motor oil should be unaffected by the heat of the stem when in use.

I was using a slightly (.7 oz.) lighter Vargo Jet-Ti burner but the Crux had better pot supports and a wider flame ring for more even heating.

I like this burner and its great controllability and, if needed, higher heat output with the larger burner ring. Very well re-designed by Brunton and a bit lighter than the Crux,

This stove is very powerful and cranks out a short boil time. It also packs incredibly small and folds out ready to go in seconds. Highly recommend it for isobutane (canister) stoving! 4 stars because of the lack of pot stabilization.

overall Good product i like the way it packs along with ib cook-set makes for more room in pack and stove protection. however after the second us while lighting it flames began to rise up from bottom of flex and top of fuel canister. thankfully i was also carrying a MSR Pocket Rocket so all was good. when i returned i home i cleaned my flex and reattempted lighting and it worked fine however, sadly on my next trip same thing as before happened again but bigger flame haven't used Flex since. However, noticing that the flex in 2007 won the Outside gear of the year award i blame my miss fortune on just one rotten egg in the cart or my own ignorance, whose to say

Fantastic product. Does exactly what it's supposed to do. Quick boil, light weight, super small, wide adjustable flame, sturdy wide support. One of the better products in my pack.