Thought I'd update this as I mentioned the light on a commuting thread.
Well its nine months in and the lights are still going strong, no loss of power/strength issues, no recharge issues, no maintaining charge issues, no switch issues. Basically exactly the same as the day I bought it.
The iBlaast system is by far the best lighting system I have found. Used as often as 5 days a week, in all conditions, for a run time of between 40mins and an hour.
10 out of 10.
If you are looking at buying a new lighting system get this one. The NZ dollar is weak at the mo and any US cyclists would get a good deal.
http://www.nightlightning.co.nz/endurenz%20details.htm
(no I don't work for the company)