Just ordered one of these bad boys. Besides the gorgeous SS, I am looking forward to having a 17500 powered light. It should fit nicely in hand. The added runtime over either the rcr123 and 14500 cells should be nice. And the variable output will make it very versatile. I plan to take it camping in the next couple of weeks so it should be fun.
I like the idea of the 17500 being the length of an AA and width if CR123 cell. I will purchase a couple of these cells but already have some nice AW14500's to use as well.