I put one on my Yugo SKS about 2 months ago. I know you're talking about the 10/22 but I think the two models are about the same.
I really like mine. It works as advertised and seems rugged enough.
I put mine on for two reasons.
1) On my SKS, it moved my rear sight back about 10 inches.
2) It had both elevation and windage adjustment. Both adjustments work well.
I had never used an aperture sight before this so I was a bit apprehensive about using the type of sight.
However, I I found I really like it. I am able to acquire the target much more quickly.
On my SKS, installing the Techsite was pretty easy. I have no experience with installing these sights on a 10/22.
The directions were clear and setup was straight forward.
One thing I haven't done yet is take it off and put it back on. It is supposed to re-zero automatically when you put it back on. I think the key here is to not over tighten the set screws.
The set screws are supposed to just make contact.
Let me know if you have any more questions.
Andy