It depends on what you want to do with it...for plinking a 3 MOA dot is fine, that will shoot all the tin cans you ever wanted too. If you were looking to try and shoot some really tight groups, at 50 yards, a 3MOA dot is pretty big, so it limits accuracy.
If you want to hunt tree rats with it, or just have it as a back up gun, that style of red dot is a great choice. Just make sure you order the one with the standard 7/8 weaver rail and not the .22 tip off mounts. The 10-22 is one of the few .22s that uses the sturdier weaver set up.
I have a silver "A1 Optics" Red Dot, lying here on My computer desk. They would probably be fine for a .22, up to perhaps even a .357. But, they are definitely not up to a .44 Mag. I put this one on My .44, & without "any" adjustment it hit dead center at 35 Yds !! 3 times, it cut the same hole "cloverleafed ! & then on the third shot, the front lense turned to "powdered glass". So, here it lays, yet. That was last spring, & this spring at the Harrisburg Show, I bought a "Millett".
Hey, I'll say it was probably My fault, for putting it on something with that much muzzle blast & a 5 1/2" Bbl.
I can tell You though, that they are very clear, w/a nice field of view, fit & finish, & probably really servicable on a reasonably tame handgun or rifle. I was really impressed, right up to the third shot !!
I have a BSA Red Dot, you know the kind sold at Wal-Mart for $29.97 well I contacted BSA about the rating. The reply back I got was that they are rated to with stand a .454 Casull or 12 Ga shotgun so they are made to take the recoil ride. Mine was free as it was the one mounted on a Hi-Point 9mm carbine before I sold it to my Uncle.
Anyway the nice thing about the red dot vs scope, is once you have it sighted in where ever that red dot is the bullet will hit....
I was right there when you or someone bought it Bountyhunter! That was too weird. It came up on my monitor and before I could get a good looksee, it totally disappeared. Now you have to post a picture with it on your gun.