The Riptide pedal is very well done. Typical for an Eventide product, it is built like a tank and has robust physical controls. I'm using it as a traditional inline stomp box, but it also has deep MIDI control capability which I might get around to eventually. :)
Sonically, it's just right. The classic Univibe sound is perfect (hello, Bridge Of Sighs!), and the drive portion of the pedal is gritty and strong, and virtually noise-free. Lots of options with simple controls and two voicings each for the Vibe and Drive sections, which are independent. I won't go into all the details as they're well documented on Eventide's web site.
Bottom line: Highly recommended!