This is my second Utopia backrest (had one on my Yamaha cruiser) and I really like it. Comfortable, very adjustable, well-made. Really makes riding your Gold Wing like sitting in your easy chair. :-)
Installation was pretty easy since Gold Wings seats are designed to include a backrest, in fact it was actually harder to remove/reinstall the seat than it was to attach the backrest to the seat. Once the seat was off, turn it upside down, drop the metal seat brace into place on pre-made backrest slots, tighten four screws and done. You do have to attach one self-tapping screw to the seat's backrest slot, but it was easy.
After the seat is reinstalled the backrest attaches to the bracket with a single bolt. The seat height and forward/backward alignment are very adjustable over a wide range.
The only quibble I have is that it'd be nice if the seat dropped forward more so that it'd lie flat against the rider seat to make it easier to get my leg over the bike. But that's a small nit, I recommend this backrest highly.

Easy to install. Took a few tries to find where I wanted it to set. I got the sport version which fit me well. My passenger would have liked it to be rigid to use as support when getting on and off the bike. Looks good and works better than anticipated!

This is the 4th Utopia backrest I have had. Each one on a different type of motorcycle. They all have been very easy to install and have held up great.

Never had a backrest before, and don't know how my back survived. I love it and my wife likes the pouch for her things.
It took a few adjustments but found the sweet spot.

This backrest has eliminated the back pain I used to get while riding. Adding a backrest changes the 3 points of contact to the bike to 4 points. Recommend this for any Goldwing.