I bought mine last year, after watching the review of nutnfancy. Price wise you can't beat it. Personally I kept the stock design it's light and fast, I have a nikon P-rimfire 2-7x32 bdc 150 approximately 200$ so very decent scope for this 22.
I bought in the past the UTG adapter but it brings the scope too high for my taste.
I've had a lot of trouble with the rings sliding on the dovetail lot of messing around, my advice would be either go with good rings from the start or go to a gun smith and drill and tap the receiver with pic rail just like big bore rifles. Now it is not moving, it's lighter than the use of the UTG adapter the scope is low and I love it.
I mainly plinked with it but I brought it a hunt willow ptarmigan up north and realized doing head shots on those partridge is not easy even with a good rest. I then went to try other ammo, shot it very carefully and to be honest that trigger sucks if you want to do precision shooting. Plinking it fine but that over travel kind of double stage trigger then pressing 6.75-7lbs is too much at least for me if I want to head shot partridge from a fair distance (25-45 yards) standing up.
I've ordered the mcarbo spring kit that will reduce the trigger pull to 3.5-4lbs, still safe to use for hunting and will give a whole lot for 40$.
I also ordered the DIProducts reviewed by nutnfance, this is not changing the trigger pull but will makes it more prime and remove the over travel with the adjusting screws. the trigger guard also seems to be bigger which would be a great thing for shooting with gloves during winter.
I highly recommend this rifle, I've had other 22s and sold them all since I was using only this one.