Dont know about the new tasco world class but the older ones were descent scopes got two one on a rem 788 in 222 that's been on their for over 30 years and one on a savage 24 20 ga/22 mag since the late 60s early 70s. One problem with the one on the savage fogged up inches about 25 years ago sended it back and they fixed it. Never a problem again. They are on guns that are used a lot and hold up.