They are a pretty sweet sight! I didn't like the distortion around the edges when moving, but the reticle is nice for a quick pickup. The center dot is (I think) 3 MOA, so keeping it super tight as a paper or small target gun it wouldn't be the greatest. This is the next generation from the TAC30, but there really isn't much difference. The MTAC has a rotating on/off, and the TAC had a push button if I remember correctly. The TAC is also over $100 cheaper, so it's a reasonable option!
I am on the market as well, and am leaning more towards the Vortex Viper PST 1-4. I liked the glass a little better, and the reticle is a little less crowded. I've been told that the Burris reticle will force your eye to center on the target faster, but I like the look of the Vortex more. The Leupold is also an option within the same price range. It has pretty decent glass as well, and a slightly different reticle than the Vortex.
As a little background I plan to use mine for 3 gunning and the occasional critter blasting!