I always wanted one and waited for months to get a $300 used one on Armslist.
I almost bought one from the guy I bought my CZ Shadow 2 from, but his son found out he was selling it and I lost out at the last minute.
Loved it. Disappointed the it was made by Umarex, but there weren't any particularly bad reviews about it, but I didn't have faith it would hold up for 10K rounds.
I sold it when my other Ruger, Browning, S/W brands were shooting more consistently & accurately, but I would have to have loved to have kept it if I hadn't started to trim.