Being this was my first weapon light purchase, I have nothing else to compare it to. I do know quality/performance when I see it though and this light rocks!
Build is very solid and the light output is amazingly bright. At the local Soccer park, it was lighting up objects well out to nearly 75yds. The power/mode switch works well although activating the Strobe feature takes some practice. All in all, this guy is a Blazer!
FWIW - I was considering the 630 lumen TLR-1 HL but am glad I bought the TLR-1 S instead as I feel for use on a Handgun, the 300 lumen light output of the S is way more than adequate.