I made a mistake and bought a Umarex Octane replete with Chinese scope. Lousy to start with, as the target image move as you move your head, indicating that the reticle is in the wrong plane. After about 100 rounds, something inside broke, and that was that! I replaced it with a NcStar red dot, since most of my shots are under 25 yards. It has stood up for about 100 rounds.
BY the way, I replaced the red dot with a Stoeger 4x16x40, which has stood up well.