Sound — 10
The UM300 can go from a subtle overdrive or a fuzz to a screaming high output monster. The UM300 has basically the same sound as a Boss Metal Zone. It has a very compressed sound with added bite, which gives you that sharp focused attack. The UM300 does have that hum when the distortion is up fairly high but in my experience that comes with all metal pedals. This pedal holds together no matter what the setting, you can have the dist down low or up high and it always has a nice character. I use the UM300 with my guitar which is fitted with DiMarzio Breeds and the tonal possibilites are amazing, it's a perfect combination for heavy rock. I play Blink 182, Off Spring, Green Day and similar artists, and this pedal can deliver the tones that these artists produce, and with the controls in an instant I can be playing something like Metallica through this pedal.
Overall Impression — 9
Personally I'm very happy with this pedal, the range on tones possible are great. It really doesn't matter what genre of music you play, this pedal can do any genre as long as you have the right settings. If this pedal were stolen I would Definately go buy a new one or get the old one back. I have compared this pedal to a Boss Metal Zone and the 2 pedals are very similar you can't really find any differences in tone between the 2. There really isn't anything to hate about this pedal it's simple, straight forward to use and has a wide range of tones. One of my personal favourites.
Reliability & Durability — 8
The pedal is made of ABS plastic whichy is roughly 4mm thick. I am a bit cautious when stepping on the pedal it can stand up to most things, but just to be safe I take that extra bit of caution. This pedal goes through about a 9 volt every Month or so, depends on use but a cheap 9 volt will last on minimum 3 weeks of continuous use. I wouldn't bring a backup, the UM300 can handle itself at gigs.
Ease of Use — 8
Its a fairly straight forward pedal, if you've ever used a Metal Zone or similar this one isn't much different. The UM300 has 6 controls (level, distortion, high, low, middle, and middle frequency). The UM300 can go from a subtle Overdrive to a screaming heavy metal pedal. The high, low, middle and middle frequency controls really allow the user to find their perfect setting. The manual isn't that great, but you don't really have to read it to get the hang of the pedal.