I put one on my Ultra 3 days ago, only have 100 miles on it. The new seat lowers you about an inch, the nose is narrower so your legs aren't spread when feet-down. It's got a more consistent feeling foam than the OEM '10 seat and is a bit cushier. The jury is out on how the foam will compress over time. If it conforms to my butt in 1000 miles or so I think I'll be real happy.
I had Mean City Cycles do a double-decker conversion to my original seat with stiff memory foam on the bottom layer and softer foam on top. I was extremely pleased with the seating position and improvement in comfort. The new 'low' seat is about the same seating position as the mod. Only reason I bought the new seat is curiosity and the fact that I just can't pass up a sale. The new seat is $154 list until sometime in April. Chicago H-D is selling it for $123 + shipping and having trouble keeping it in stock, Zanotti's is getting $130 + shipping.
Anybody with a stock '09 or '10 el-crappo seat ought to jump all over this before the price goes up!
Although the .pdf indicates there's also a new strap and backrest they're a useless expendature, IMO. The old strap fits fine and the only change in the backrest is the top is smooth instead of the slight pleating. New seat looks fine with both.
TL