I had the UPP coilovers installed, and it wasn’t the best experience. The results are okay, not great.
UPP advertises that with the kit you can raise or lower the car by about an inch in either direction. In practice, the kit they send in the mail will lower your car by about half an inch. If you want to keep it stock or raise it, UPP has to send different springs for the rear. This isn’t articulated in the listing, so people should be aware of that.
Partially as a result of this, I had to pay to have the kit reinstalled after UPP sent the replacement springs. My installer discounted the second one slightly, but I still ended up spending almost $1500 on installation alone.
In retrospect with something like this, you probably want to work with the vendor and the installer ahead of time, make sure everybody is clear on what you’re trying to achieve and that everybody is comfortable it can be done.
Now that I have the coilovers installed, it definitely rides better than before. I had an early VIN, and the ride sucked compared to the 3 I traded in. The car floats a little bit on the softer ride settings, but it’s tolerable. The downside is that going over bumps is much louder than with the stock suspension. I don’t know how the MPP equivalent compares. In my case I’m better off than I was before, but certainly not $4,000 better off.