I spent an hour last night fiddling with my newest cheapy pedal acquisition, the Behringer BUF300 Ultra Flanger for Bass. First off, I am impressed with the preservation of the low end. I did my hour-long experimentation with just bass -> flanger -> GK amp. In all, I like the flanger sounds it makes. It can do a very long sweep for the slow songs. It can also get weird where it almost sounds like the flanger sound ends up going backwards.