Purchased from: Got it as a gift
Sound — 10
I have Washburn G-5V guitar with Seymour Duncan humbucker on the bridge. I play mostly hard rock so I rarely use neck and mid pickups which are both single coil..I have used multiple amps with it and it sounds great on every. My friend that plays with me in my band bought Boss DS1 couple of days ago and I totally like JackHammer more... The Boss is kinda too artificial to me... JackHammer.
Overall Impression — 10
I play mainly hard rock, but I all-together, I play everything. This pedal completely fulfills my needs... I'm playing actively for 2 years now and I have had chance to deal with all sorts of processors and pedals and in field of stomp boxes JH-1 is absolute leader! I just don't like that I didn't get a power supplier with it and that I had to buy one separately (about 5$). If stolen I'd buy it again (I got it as a present (though I asked for it)), or I'd save more money and buy Ibanez TubeScreamer (just because Kirk Hammett uses it)
Reliability & Durability — 10
I totally depend on it. I have had couple of gigs with it and haven't had any problems with it never. I use it without backup. Before I bought it I used my friend's Zoom GFX5 and I could use it after I bought it but I like it's distortion better so I don't even take this Zoom to gigs, it stays at home. It's built as a brick and I'm not afraid of throwing it at my drummer when he plays too loud.
Ease of Use — 10
This pedal could be a bit complicated for beginners to get good sound from it because of the "Contour/Frequency" knobs, but if you give it some time, you can get most amazing sound. I give it a ten because I have found my favorite sound. It's manual is basic, but I didn't expect anything more because it's a distortion pedal and there is no much philosophy in using it. There are some distortion presets given in the manual, but I didn't like any so I kinda made my own sound.