Got a knock-off Yong Heng compressor for my B'day, had to get it repaired pretty soon after I got it, but didn't want to tell the givers it had broken!. Before I had it repaired, I realized how much easier it made my PCP shooting life. While the gift pump was in the shop, I found a REAL YONG HENG compressor on closeout from WalMart, originally (so they say) $999.00, for $250 on closeout! This thing is wonderful, smooth, powerful and doesn't heat up nearly as fast as the knock-off. Won't go over 50C, with water cooling. Now I have 2 pumps, gonna wear out the knock-off, with care till she dies.