In reply to Busby:
I've not used it, but I'd be reticent to buy a torch working of CR123A cells - hugely expensive compared to AAs and not nearly as common (so less much likely to find them in garages or wee shops). Our team hand torches use them and it's the number 1 complaint about them. Unusually it you can't substitute a 18650 (lithium-ion rechargeable) which would have made it a much better torch imo.
Fenix do some very similar looking ones (up to 900lumens on boost though!) that work with 18650 rechargeable batteries as well as CR123A if your interested that kind of spec of torch. If you're not worried about re-charging opportunities, units running off 18650 Cells make for great lightweight but powerful torches.
Sorry I can't comment on the actual torch though!