I posted a review on hold sensitivity in the Bargain Gate thread. There's a general review by the fellow who does Pellets and Pistons on YouTube and the owner who loaned him the gun later reported it dropped fps from a nicked seal and visible melting from burned lube which had worked ahead. He replaced it with a TX200 seal but eventually added he would not recommend the gun. I think I came across another post which spoke to over-lubing, so I'd clean the compression tube before breaking one in. I keep looking at these, myself, despite the negatives, lol. That's me. Whatta deal!