Whirlibird, the Sig522 are very durable, my son gets a better grouping then I do but I think it is my eyes are not as good as his. Son gets at 50 yds group of 1″ and 100 yds in the 1 1/2 to 2″ grouping. My grouping are all over the place so I got to get new eye wear.
They are more money then a Ruger 10/22 but I got them because my plan is to buy the Colt AR 15 for my son and one for me so the Sig522 is close to the look and feel of an AR. Also the folding stock makes them compact and easy to handle in close quarters.
I think if you have the extra cash they are a good buy but if you do not then just buy the Ruger.