I've got a 2018 SLR. The geometry matches my customs so I thought I'd give it a try -- and also because: 1) I was intrigued by DM brakes, 2) it was available with ghost logos, and 3) I got a super sweet deal on it.
It took some trial and error to get the rear ISO speed to feel just right -- but that's the beauty of a frame like this -- it can literally be dialed.
It has a few negatives, ie, wonky rear brake cable routing out of the TT and a sometimes creaky front ISO speed, and a non-threaded BB, but other than that, it rides beautifully.
I won't claim it will help anyone's back (nor will Trek), but it definitely smooths the rough stuff. All in all, it's a badass bike.
