Well, my MatchDot is on a semi-auto 22 pistol. As you look thru it you will see a red dot that will cover 8, 6, 4 or 2 inches @ 100 yards. You won't need to worry about the dot not being in the middle of the view (if you are not holding it absolutely perpendicular to the surface of your eye). If you can see the Dot, that is all that is required.
You will be able to adjust the brightness to suit the ambient light around you. It'll take a little practice to bring up the handgun so you can see the dot right away, but you'll figure it out quickly.
The dot WILL dance around and you may want to start with a solid rest to minimize this. One of my back-yard targets is a 2 1/2" swinging disc @ 25 yards. With the MatchDot, you can make it dance (from a rest).
Having NO magnification means (to me) shooting with both eyes open and acquiring targets a bit more quickly. If the UltraDot were, say, 4X, that dot would REALLY jump around on a handgun (as crosshairs in a scope do).
It would be nice if you could try one before buying. However, I shot mine very little in the first years I owned it and now shoot it at least a couple times a month. I guess it grew on me.
I'm sorry but there is just no way of knowing if it'd be a good fit for what you want. I use mine for informal targets and some Rabbit and Ground Squirrel hunting. I keep it in an over-sized gun rug as I have no holster that fits it. You have to remember to shut it off after every use --- the battery is good for a very long time this way.