anyone use the 3x9x50 E1

Yes. Good low price scope. Clear and repeatable. On par with a Leupold VX-1/VX2, Vortex Diamondback, or Bushnell 3200.

Mine has been used as a test scope for various rifle builds from .270 to .375 Ruger. No issues with it so far. Probably 300 rounds under it in various calibers.

Jeremy