Just to add to the chorus of approval, I bought my SRT7 as soon as they became available and it has performed flawlessly since then - I had it on my bike as front light for about a year - running at 50-100% output, generally. It is the first light slung in the bag when I go out without my bike too.
No problems to report. But I am intrigued to try it on two RCR123A cells.
Enjoy your light.
I see you're in London. What did you use for a bike mount and where did you get it?