Things I liked:build quality, weight, accuracy. I own a TX200 and now the R9. These two guns do nothing but compliment each other. The R9 just wants to be shot all day.I now have a hard time deciding which one to pick up. So I take them both everywhere. I am using a Bushnell Trophy XLT 4/12/40.And H&N 14.6 field target pellets are getting my best groups. Things I would have changed:nothing! just an awesome gun. What others should know:This is an all around fantastic gun that is a bargain for what it does. It will make you smile every time you pick it up to shoot.