I didn't get to ride as long as planned, but I did put 111 miles on the new seat yesterday. About three hours total, with the longest single stretch 1 hr. 45 min. That was enough to tell that it is a significant improvement over the stock seat, but there is a issue for me, a short rider.
Let me clarify a little bit about the stock seat I'm comparing this to.
I have a 2012 Bonneville (Basic, not SE) and it came with the seat that has the rider section "cut down" to lower the seat height.
Now, I'm short (5' 7") and even I felt that this was too low and constraining. So, I bought a seat on eBay that was removed from a 2007 T100. This seat is all one level and feels about an inch higher than my stock seat. It wasn't any more comfortable as far as getting saddle sore, but it was more comfortable as far as my legs not being bent quite as much and freedom of movement and I could still put my feet flat on the ground.
This Mustang seat (Ribbed One-Piece Seat, Part Number: 76827) feels about the same height as the T100 seat. So, if you have a "cut down" seat, you'll notice an increase in seat height, but if you have T100 type seat, you won't.
I don't know if the Classic One-Piece Seat, Part Number: 76828 is the same height. Looking at the pictures on the Mustang web site, the Ribbed One-Piece Seat looked like it might be thicker, so that's why I chose it. I wish Mustang would give more information and images than they have now.
I tried to be a little more scientific and took some comparison measurements just to show that there are differences in the seats.
I put the bike on the center stand and installed each seat. I placed a level on what looked like the lowest part of each seat and measured from the floor to the bottom of the level. I tried to measure as close to the same point as possible.
Stock Seat: 30 3/4 In.
T100 Seat: 31 1/2 In.
Mustang Seat: 31 1/4 In.
Rider Section Length:
Stock Seat: 14 1/4 In.
T100 Seat: 15 In.
Mustang Seat: 17 In.
Rider Section Width (at widest point):
Stock Seat: 11 In.
T100 Seat: 11 In.
Mustang Seat: 12 1/2 In.
Passenger Section Length:
Stock Seat: 11 1/2 In.
T100 Seat: 12 In.
Mustang Seat: 12 In.
Passenger Section Width (at widest point):
Stock Seat: 11 In.
T100 Seat: 11 In.
Mustang Seat: 10 1/2 In.
Now, the issue I mentioned earlier has to do with the length of the rider section of the seat.
As I stated, I'm short in height and arm length, so I sit toward the front of the seat to reach the handlebars comfortably. Unfortunately for me, the widest and most supportive part of the Mustang seat is at the rear of the rider section and I can't comfortably sit all the way back to take advantage of it. I tried, but it's too much of a stretch and I leaned forward too much to stay in that position for very long. But, I could feel the full support the seat has at that point.
For taller riders, this extra room front to back, will probably be welcomed, but for me, it would be better if the rider section was a couple inches shorter, 15 in. instead of 17 in.
I've been thinking about handlebar risers for a while, so this is probably a good time to get them and see if they help.
So, even though I'm not sitting on the best part of the seat, it is still a big improvement.
I didn't get the usual numb butt saddle soreness I usually do riding that length of time and I didn't have to stand on the pegs to get relief.
This is a good, high quality, comfortable seat, but with seats, one size does not fit all. This one will be good for the majority of riders, though and overall, I'm happy with it.
Maybe in the future, Mustang will offer short rider versions with rider sections moved forward. Harley did exactly that several years ago.