Price paid: $ 60
Purchased from: Local shop
Sound — 4
This pedal has a serious sound problem: when using the MANUAL and specially the DEPTH knob, the oscilator flanges its own hiss and transforms it into saturation that distorts the tone on every pick. The distorted sound is fuzzy. I checked it out with both power supply and battery, and it seems to be a fault in the project itself, since some other reviewers noted and/or complained about the same thing. Those siren-like weird sounds are something exotic, and funny, but just as curious note. No practical use. Definitely, if you want a good Chorus, Flanger or Phaser, go away from these Behringer digital cheapos.
Overall Impression — 4
I had stopped playing guitar 20 years ago, since I had to sell my whole equipment, due to an economy plan that left me BROKE. The gear included a very good Brazilian made Les Paul guitar, Boss DF-2 and BF-2 and DigiTech PDS 2000. During that time I only played acoustic guitar and sometimes some friend's electric guitar. Now I decided to resume my "career", playing for fun and beer. In despite of this huge gap, I have trained ears, and I can still say if an effect is good quality or not. I tested UF-100 carefully, and it didn't pass. I returned that thing, gave a bit more and happily got a Onerr Hydrogen Flanger as a replace, an analog pedal, which sometimes reminds me of my dear BF-2. UF-100 is a complete failure. I bought it because I have an UD-100 Ultra Distortion, which is very decent. So I wanted to complete my setup with a matching pedal and I thought they would be kind of a perfect couple. My advice for the young: The Behringer drives and distortions are good things to begin with, and you can keep them, but run away from the modulation pedals. If you don't want frustration, spend a little more on good quality effects.
Reliability & Durability — 8
I didn't keep the flanger for long, but I can say it could last. I have an Ultra Distortion, which I bought used, with some minor scratches due to the old owner's abuses. It doesn't have any cracks, though. The Behringer pedals seem to be more resistant than they look like. There is a guy in You Tube that made an "abuse test" with a Behringer and it passed all the spanking and dropping. So I think this is one thing positive regarding Behringer stomp boxes.
Ease of Use — 5
This thing deceived me at a first look, since the knob names are the same as found in BF-2 Boss Flanger. The latter was my pedal 20 years ago, which I loved. However, any similarity ends up now. It was very hard to get any Chorus or Phaser-like sound from the UF-100, specially because the MANUAL and DEPTH knobs are useless. The 2-mode Switch doesn't help to get this thing easier to set up. Just adds more confusion. About the manual... One page doesn't say anything. Useless!