I have a lot of experiance with Sightron S2 BigSky and S3 and IMHO for the money they are up there with the best of them (ie: Zeiss Conquest, Vortex Viper PST ect). I know a few people with the Sightron S2 and S1's and they look to be good for the money as well. Tell me what do you want to do with the scope (hunting, target work)?