My .30 Impact is my fav of all my guns.
About two years into owning it, it developed a leak. I wanted a tune by Ernest so sent it to him. He got it fixed quite quickly and it came back shooting 100fpe! I was happy.
2nd outing it developed a bad leak.
Sent it back to FX to be corrected and talked to Ernest again, he said the MKII upgrades would pickup another 40fps. So I said go for it.
Got it back again less the magazine.

It came with a spec report of 16 shots and it lost 40fpe and they turned the reg up too.
Stuck it in the safe while I awaited FX to send a mag. Went to show it to a friend and noticed it'd lost 100 bar over a couple weeks.
Contacted FX about the leak, missing mag, loss of performance. They were nice about it, as was I, and another RMA was issued. They have it now and I expect to get it back soon.
When it's on, it's on at 75 & 100 yds and it's lights out for whatever is under the reticle. Shooting at close range is a never-miss joke. I get harrasssed by my friends not to use the Impact when we are doing close range work. But even with the above issues, it's still my favorite gun.
I have a number of other quality guns too. I have a .177 Edgun R5M which is pretty nice, it's no impact, but it's pretty nice. A .45 winchester which (IMHO) is junk. A AAS510 which was my first airgun and is really nice (though I don't shoot it much anymore.)
Maybe it's just being a .30, but the Impact really draws my attention. Looking for a 580cc bottle and 700mm barrel for it.