I did not get to ride yesterday when I put the new tall backrest on because it rained off and on all day, but this morning I went a for ride and wow, what a difference this tall back rest makes over the stock piece.
It is not like an aftermarket backrest that goes halfway up your back but instead it supports your lower back which is exactly what I need, this Yamaha tall backrest keeps me from slumping down while riding by providing the support to my lower back so I stay sitting straight up with out the slumping as I ride.
The Yamaha tall backrest is worth the money in my opinion, I have had the full size backrests on my last three touring bikes, 1989 GoldWing GL1500 a Markham backrest I believe it was, the 2013 Victory Cross Country Tour an Ultimate seat and Backrest and the Harley Davidson Ultra Limited Low a Harley hammock seat and Harley backrest.
I was a little worried that the Yamaha tall backrest would not be tall enough but it supports my lower back just right without being in the way for my wife to get on and off the rear of the seat. The other bikes the backrest would bend forward to give more room but you still have to get up over them.
Plus I did not care to cut the leather of the seat to make a hole for the aftermarket Ultimate backrest they developed. If the seat was not already designed with the hole in it and the leather covering properly sown then I worried about water getting in the seat soaking the foam and the leather tearing over time because you cut it. So that pretty much eliminated the Ultimate backrest for me from the start.
I agree to all your bullet points. While I liked where my Kury're (on the 2008 GoldWing)mid-back back rest, that also pitched forward, hit my back, it was a different saddle-body-positioning. You don't sit into, a stock GoldWing saddle, as you do upon the SVTC. So, given that...with the Yamaha Tall Backrest (I call it a Tall Boy, lol) set to the first of three forward positions, my butt settles deep into this great stock saddle, and then I will wiggle-down into the back rest/saddle juncture, and can then let all pressure off of my shoulders, back, and arms, with that juncture taking all my upper body weight. This quite frankly, is the very first bike in over 50 years of continuous bike ownership, that I can sit for hours upon the saddle...and NOT squirm, trying to get comfortable, or relieve a hot spot on the butt cheeks....a total first, as is, for my wife back there on 'the throne'. No squirming from her either...and on our 2008 GoldWing, (which also had a nice stock saddle) yet..both of us, would get Sore/Hot Butt, within an hour and a half upon her. This bike? We can go for hours...and only our bladders, or the tank running to a quarter left...has us looking to get off. All this...on a stock saddle! We are simply amazed with this bike...saddle, features, engine, sound...stereo and muffler tips, carrying capacity....the all of it. The best decision I have ever made, for a total tour mount. Honda....THANK YOU....THANK YOU! You rock in 2018, LOL! I wish you all the best with your new ST-1832.