I had been thinking about a red dot for a while myself, as I find it hard to really accurately see the back sights on the black bullseye. We shoot at 25 meters at ISSF competion targets, most folks here use the 6' clock aim but if you want te keep the gun sighted in 'on target' for other competions, that was not an good option to us.
My wife is wearing glasses, but those only help long distance. So I got her a nice -tube- red dot for her buckmark, and it really works great... we were both able to shoot better and more relaxed with it.
Know that we do shoot indoor and the guns are only used at the range, holsters are not allowed. It's a pretty dark range and in the past I did paint my 617 front sight bright red (daughters nailpolish). It helped only marginal as there is not enough light in that place to see the red shine, a fiber optic front would work better but I didn't want any gunsmithing done on it.
So I decided to get a red dot for the 617 as well, but due to budget reasons I had to find something a lot cheaper.
I ended up with a large open style one, mounted on a weaver rail. But it ended up pretty bulky (yes, I couln't get myself to spend the money to buy a small size one), the shop told me they used it on shotguns to (so it's big and heavy but solid)
We tested it last friday for the first time. At the range I did get some comments about the size and the fact I put such a large red dot on 'only' a 22LR, but after a while people became interested in it and wanted to try it out as well. I started talking to some folks and found out I'm not the only one trying a red dot to get better results.
You know... it was great fun! And although I regret my setup doesn't look as good as lakers1138 picture, it does work excellent. Another great advantage is that I can now shoot with both eyes open, before I had to close my right eye and aim with the left, holding the gun right handed... yes, cross dominant as well. I was worried the red dot would take to much room on the target, not allowing me to hit the center, but ended up not beeing a problem. Well, at least not shooting from a rest, cause I'm not that good
I really found it a LOT easier to target the center of the bullseye. You can see any movement you make a lot better (including shaking) and I think it will be a good tool to train myself on better trigger control.
I seem to have astigmatisme to. I did try a more expensive red dot in the shop, and my eye's just can't see it being sharper than the cheaper one I got. So I first wanted to try it out for a while, I can always save and buy a nicer one later.
The big red dot I have is heavy and it does seem to affect the balance, but I'll just live with it.
P.