I got my T100 seat for my bonneville redone by a local Shop. Added a little bit of seat height, two tone all leather. Gel and memory foam. The seat is tremendously comfortable and the workmanship is awesome. I got the two tone seat and Its taking a little getting used to. Wondering if I should've done all black......Hmmmm. Might get one made in black as well to see how much of a difference it makes in the over all look.
Regardless the workmanship and quality of materials is top notch. Here's a pictures. It looks a hell of a lot better in person than in picture. It cost $300 for them to shave the existing foam, add Gel and memory foam and make a custom 2 tone all Leather seat cover. I think its worth it for the quality and materials used.