Price paid: $ 75
Purchased from: Local store second-hand.
Sound — 9
I'm playing it on Jackson JS30-DK (Jackson pickups), Laney HCM65R combo. Sometimes gets noisy on max. gain/pickup volume on guitar. After some time testing it, I've finally reached the sound I wanted and it's wonderful (considering it's a cheap effect pedal). Perfect price/quality ratio.
Overall Impression — 9
I'm playing metalcore/deathcore/thrash riffs, so the Jackhammer is the perfect fit. I've been playing for over a year now, but I'm a quick learner. If I had to choose again, I might try some Boss stuff, but I'm not sure about that. Compared to Boss Hypermetal it has much cleaner sound. It's a perfect choice in it's category.
Reliability & Durability — 10
So far it has never let me down. I haven't played any shows with it so far, but I'll test it when I get the chance to do so. So far, it has been doing it's work perfectly. Only thing I fear about is it's body, I've seen much broken potentiometers, the body itself is tought and hard to destroy, but the controllers look fragile.
Ease of Use — 7
It took about two months to get the sound I wanted. There wasn't any manual, I don't have even the original box for it, it was second hand. If you're patient and willing to give it some time, you will be most impressed. However, if you're less patient, you should get some Boss pedal, you'll get a great sound right away, but in time, there are too few things to experiment with, you'll get just a fraction of Jackhammer has to offer.