I just got a set and installed the left side this weekend.
Definitely the most complicated rear sets I've ever installed. Not in a negative way, they just have a bunch of hardware when compared to their older models.
Yes, you can run either standard or GP shift with the OEM shift sensor, no reprogramming necessary, just bolt on the additional rocker and links to convert to GP shift.
The peg adjustability is also different from their older models. Gone is the array of machined holes. Now they use 2 hole locations and a pivoting bracket that gives you different locations.
Biggest gripe is that you'll have to remove the rear sets from the chassis to make any adjustments. Not hard to do, but it's an extra inconvenience.
On the plus side, they hit the price point again, and still have the same Vortex quality and sturdiness that I've come to expect from them. I'll have the bike out on the track in 2 weeks, if I come up with any big observations, I'll post an update.