I’ve been running an XPG triple for about three or four months now and really like it. I wouldn’t say the beam was narrow, it’s actually quite a lot broader than my home-brew Cutter quads and a good compromise between throw and spread ime. I like having a battery level gauge, which seems to work just fine, and while the instructions for the switching sequence seem complicated when you read through them, in use it all works very intuitively.
Connector seems secure, though I did manage to pull it out on a fast descent last night – velcro lead to the stem usually – but that was basically user error. I think it’s really good light, no issues so far and makes sense if you already have a compatible Lumi battery. Yes, you could do brighter and cheaper as a home brew, but I can’t be arsed at the moment.
Oh, and run time is good, 3 hours plus with the smaller battery if you’re sensible about which levels you use, very easy to toggle up and down according to need.