Despite the dearth of hard information available about this lens, I bought one earlier this summer and I've been trying it out for my Arch/Interiors work. At US $3300, it's a significant investment.
I work primarily with the Canon 24TS on a 5DmIII. I also own and occasionally use the 17TS, and I have the Canon 1.4x Extender (v.II) which gives me an effective 33.6mmTS lens when coupled with the 24mm. But -- I've been really missing a 50mm lens with movements. The solution up to now has been the 24 + 1.4 = 33.6, and then cropping....which is not exactly optimal!
Here are a few sample images. The interiors were shot "on the job", the tall buildings were just to take the lens out for a spin and look for distortion. Since the Schneider doesn't record to the EXIF, I can't say with certainty what the apertures were, but I'm normally working between f/10 and f/13. Both of these shots involved shift, likely in the 8mm to 10mm range.
I did a few informal side-by-side comparisons, shooting the same subject with the Schneider, with the "24TS + 1.4X & Crop", and with my trusty "Nifty-Fifty" (Canon 50mm 1.8 plastic lens) and found that the Schneider is nowhere NEAR as good as the 24TS alone (no surprise) but is about the equivalent of the "24TS +1.4x & Crop" method...with the clear advantage of retaining the full pixel count, of course.
The Schneider has some noticeable CA, which is entirely correctable with Lightroom's "auto" CA setting.
The Shift movements are a little awkward to operate. After years of using the Canon TS, I'm still finding it hard to get the Schneider where I want it on the first try. But I'm never really working in a big hurry, so for me that's not a deal-breaker. The Tilt movement, on the other hand, is kind of awesome. It's the same system as the shift (a rotating ring, and a spring-loaded ring; one moves the lens, the other rotates it) but the positioning of the Tilt makes it very easy. Shift....not so much. Overall, it seems to be built VERY robustly. You get a nice confidence just handling it.
Overall, I'm happy. It's the best TS lens in that focal length I've tried. I wish it were sharper, but honestly I think I'm kind of spoiled by the Canon 24!