I just retired my gen 1 BD Storm and got the new one. I like the "latch" ability on the new one to speed/ease the change out of batteries. I alway forget to replace the batts after the last mission and end up doing it either in the field or when getting ready at staging. I like a big swing range to dip the light, so as not to blind folks I am talking and to show me where I am walking.
A couple of dittos to some other comments: I rarely have mine set on the brightest setting, usually have it dimmed down. I also carry a Big Larry LED light clipped to the chest strap on my pack as a backup and/or to get a offset light angle when needed.
About a 50/50 split on our team on folks who carry a all-in-one vs. a separate batt pack light. I am old and every ounce counts, Never had mission where I ran out of power (unless I forgot to change out batts).
Like on a avy beacon, I don't use rechargeables, because of the abrupt power drop-off when you are at the end of the batts life. I like the tapper-off of a non-rechargeable.
My two cents.