+1 on shooting at a target in the sun while the sight is in the shade...too difficult to pick up and needs to be turned on. My biggest gripe with the Tri-Power (I've had the EO Tech, Tri-Power, and two Comp M3's, 2 and a 4 MOA), is that the chevron reticle is too wide at it's base. In other words, the angle of the chevron is too obtuse. Imagine taking a straight line and trying to center your target where you think the mid point of the line might be. This is a bit of an exaggeration, but it helps illustrate my point. The tip of the reticle should be sharper.
When I tried to use the reticle for precise shots, I found it hard to get the target exactly on the point of the chevron. The thinner chevrons of the RCO sight is a little better, but in the end I went with the Aimpoint (and an RCO also).
I also used an Aimpoint 3x device with the Tri-power and found that the chevron became ENORMOUS under the magnification (even bigger than the target most of the time). Now I use the Comp M3 w/ 4 MOA as a stand alone sight, and the 2 MOA is for use with the 3x device. I don't have to make sure my target is on the tip of the chevron; now I just put the dot on target and slap the trigger.
The Tri-Power is a nice idea, but I think it would have done better if it used a simple dot reticle. Overall, it's an okay device, but it doesn't really do an outstanding job in any one area. Too bad...