First for Bishop.
Yes, I have because it's my sisters' favorite mountain, so I've skied it a few times. It's really small, but I think there's like one double diamond of moderate difficulty, but that's only in mid-season when it's completely bumped up. The park is alright. In conclusion, meh.
If you normally ski at SR or Sugarloaf you'll be underwhelmed, that's for sure.