I've had this pedal for a while now and have fallen in and out of love with it and back again. I tried it just about everywhere in my effects chain until I settled on keeping it towards the front end. This pedal sounds magnificent when it drives a good distortion or overdrive and has enough kick to shine through a compressor, as it adds a discernible boost in the treble frequencies when turned on. This is also great for clean parts because it lifts the guitar out of the mix. Anyone who, like me, has to fight for sonic territory with another guitarist and a keyboard player in the band will appreciate this. (By the way, I found that it's this boost that is the most notable difference between this 'block logo' version and the vintage '74 reissue.) Operating the pedal is easy, the only knob regulates the speed of the phasing effect, ranging from a slow wash to a whacked out wobble. Despite it's simplicity, this orange box ended up covering a lot of bases for me. With it, I can get pretty close to a wah-wah effect but the Phase 90 also produces a convincing rotary/Univibe swirl (about halfway on the dial) and has also worked decently as a replacement for a flanger, where a similar effect is needed.
