Waldo is spot on.
This pedal is for all kinds of uses. It's partly inspired by the fact that single coil pickups into clean tube amps can make a very ice-picky spike with the pick attacks. One approach to clipping is to overdrive a preamp. Some preamps will do this from one tube stage to the next. Others will use booster devices to clip the first tube. Triode (preamp tube) clipping is a certain type of clipping that's pretty asymmetrical, and has a mushy, soft bass response, a compressed feel, and lots of overtones. To me, triode clipping is not really a very Jerry sound. I believe pretty strongly that for the most part, Jerry's sound came from a fairly to very clean tube preamp with lots of dynamic, percussive, expressive headroom, and the clipping largely came from a clipped power amp and saturated speakers. I know there are players who try this, but to my ears, this gives a splatty, compressed, choked sound that doesn't let the guitar breathe and "pop" and have the big dimension Jerry had.
The type of clipping I'm going for with this pedal is much more symmetrical, and is more in line with the type of clipping you'd get from a well balanced Twin Reverb or a McIntosh power amp. It's a stiffer, cleaner, more dynamic, punchier sound that nicely removes the ice-picky transients, and also creates a harmonic distortion that's not quite as complex or messy as the asymmetrical approach.
It's definitely not a replacement for the MXR+, and hopefully will be a nice complement to it. Since many of us are using very clean rigs, this pedal would likely be the very last pedal in a chain before the preamp, even after delay, maybe even after an OBEL loop and the guitar. That's how Jeff Mattson is using his prototype with DSO. It's right before the SMS Classic preamp input. He sets it so it just barely clips when he digs in or turns way up. It lets him shave off and round off and smooth over the pick spikes, yet doesn't change his guitar tone and doesn't create too much distortion. His Bryston power amp is way too powerful and clean to clip. He even blew an E120 recently.
One could use this as a normal overdrive pedal as well because it will also get fairly dirty if you want it to.
... and it's just like any other day that's ever been...