I have a Myo XP. Although it's a bit heavier than the popular Tika, I found it surprisingly comfortable and stable. But, David is right about the extra strap - it tended to slip down to rest on my ears otherwise.
Can't compare it to any other torches, but it's definitely very bright (dazzlingly so, and way too bright to look at directly). I'm partially sighted, so perhaps find it less effective than most would. Even so, using the wide-angle beam, I was happy running though my local (unlit) park at night, and could even manage through woods with a little caution (totally dark otherwise). I imagine it must be fine for folks with good eyes.