Backrest
Works but not adjustable front to back as advertised.

SlingMods Response:
Hello Robert, this is actually adjustable horizontally. Please let us know if you'd like further assistance on how to do this. Thank you!

This is high quality product. I had to modify it because I needed lumbar support and the backrest it self was too high on my back. A little modification and it works perfectly.

Small backrest for my 2021 RT Limited
The installation instructions were ok, but I would have preferred better pictures. As a brand new Spyder owner, I struggled with things that someone more familiar with it might find easy, such as, getting the rear seat unlatched and lifting the seat frame to get the vertical post in the right place. Once I was able to install the entire setup, I was disappointed that the backrest was not adjustable far enough to the rear for optimal comfort and the pad itself was just too small for my liking. It made the riding position tolerable but disappointing.
Then I compared the backrest pad to the one on my 2006 Honda Gold Wing. Looked like I might have a match. I uninstalled just the old backrest pad off my Wing and it fit perfectly onto the new backrest hardware on my Spyder. It now sits just right and is very comfortable to ride the Spyder!! I gave this a 3 star rating because of the inadequate instructions and that it just wouldn't adjust farther to the rear for this 6'2" 260 lb man to be comfortable on rides. Note the 2 photos with the Gold Wing backrest pad now on the Spyder and the new Spyder backrest now on the Gold Wing.

Back rest
It works well. Made riding lot better

Good quality but too small for me
Installed easily and seems to be good quality however the backrest was too small for me. I ended up with a *** backrest.