Jimmy Page and Van Halen use it, do I need to say more?
I know it's not the original "tape" delay, it's a digital replication, but man, it does sound superb.
Perfect for solos and for rhythm sections. Instant 70's early 80's tone. You won't find it on any other delay pedal.
Construction is also quite robust, and the knobs DON'T move easily. I've had the guitar cable stumble on it and the knobs didn't move, great so you don't loose your settings.
It also comes with some cool Echoplex stickers, nice touch.