I have the MR11 and love it. It is compact and pretty rugged. Just don’t drop the light head (especially when it is on) or you will probably wreck the bulb (which Diverite claims is not user replaceable). I have a buddy that uses the H24, which is similar to the H10, with the adjustable reflector. He likes the light, but has had the reflector break off a couple times. I personally like the MR11 better than the H10 and they will both put out about the same amount of light and use the same battery, can, etc. I guess it comes down to the adjustable reflector H10 or the more compact rugged design MR11.