The Empress Effects Phaser might just be the best phaser around.
Firstly, it crams an unbelievable amount of functionality into an incredibly tiny space. This won't take up much pedal board real estate. The different modes/wave forms available, as well as the options of 2/3/4 pole phase means that there is something for everyone in this phaser. If you choose not to go too deep into the pedal, just plug in and go - guaranteed easy phasing settings within 1 minute.
I particularly like the square wave step of mode 8, which has replaced my Zvex Seek Wah.
Another useful function is that you can control parameters (like tap tempo) by midi via the empress midibox. This means that you can midi-sync the tempo to other pedals/midi clocks/loopers/drum machines.
Outstanding pedal!