I’ve got the Flare as well, first time I used it this morning and I was considering it as I rode in (hey, it was a slow day).
I quite like the bracket, the light seemed pretty solid in place. It is stupidly bonkers bright, the light itself is well made and very neat but I’m not sure it’s worth £40. I think it’s aimed at the hardcore commuter market, the people who are fed up with spending £15 – £20 a time on lights that aren’t that bright or durable, this seems like it will fit that bill and, looking at the Exposure lights thread, there are brand loyal people who will buy it anyway.
I’d say it’d be very useful for MTBers as an emergency rear light as well for if you get caught out on an evening ride, it’s dead simple to whip it off the commuter and tuck it into a backpack and the twist on/off means it’ll never get accidently turned on in a camelbak.
Agree about the batteries though, £5 a time on specialist batteries is a bit of a pain – time to go the rechargeable route.