Schmit, I got to play with a Tri-power at the WC3gun (team Trijicon was there).
First impressions, IT WAS AWESOME.
I didn't get a chance to use it much, (or see if I could break it) but my first impressions are that it is the best sight of its kind that I have ever seen.
The chevron rectical is easier to use than the dot, covers less target, and gives you a better aiming point. The tritium and fiber optics illuminate just about everything. The only time you have to turn the batteries on is when you are standing in the shade aiming out into bright sunshine. But even then it was still visable with out turning on the batteries. There is also a tube that you can drop a mini glowstick into it for illumination.
Plus compared to most of Trijicon's stuff, it is relatively affordable, under $400 IIRC.