The quality, and the used materials are good, but the fact, how the side flip system works, is really unprofessional, everything works opposite how it should, and you cannot change on anything. How you switch the magnification, you have to change the distance for your eyes, because in other chase you will not see anything about your red dot. Long story short, it is good only if you are a hobby shooter and you don't have high expectations. The seller was really good, and helpful, you will not have any problem with them.