Corbin Solo Saddle WHY? Comfort and appearance.  Although the stock seat isn't a bad one, I found that it only held up for a couple of hours before rider fatigue set in; in addition, it's awfully plain-looking.  I decided that a new seat was in order.  I have owned Corbin solo saddles on a number of other motorcycles in the past, so I decided to try their model for the Softail.  Although Corbin sells directly through their web site you can often find better prices from aftermarket suppliers; I did an online search and found my best deal at an eBay reseller called americanclassicmotors.  They offered the seat I wanted (#ST0-S) in plain or with studs and I chose the plain model because I felt that it would look better with my saddlebags.  I made the buy and paid via Paypal--$318 plus shipping. SERVICE.  Excellent.  I received an email confirmation immediately after the purchase and the next day I received a shipping notification and a shipping tracking number.  The box arrived at my doorstep 5 days later via UPS--great service by any standard!  The seat arrived packed in the original factory box and looked to be in excellent condition.  I liked the appearance of the pebble-grain leather on the seating surface, and the seams were clean and straight.  No mounting instructions were included. INSTALLATION. Not too difficult, and one that can be accomplished by the average home mechanic.  My 2006 Heritage uses a slightly different mounting system than did previous Softail models so the installation was just slightly complicated.  The stock seat was held in place by a removable bracket on the fender, but the new saddle needed to be secured by a 1/2" bolt on either side of the frame.  These bolts were not included with the new seat so I had to make fast trip to Home Depot to pick up a couple.  It has been my experience that Corbin's seats fit quite snugly and sometimes require quite a bit of manipulation to get them into place.  I had to sit on this particular seat to hold it in place while I bolted it to the frame. RESULTS.  Really nice.  Let me point out here that Corbin seats are an acquired taste; they are quite firm, and your first impression might be that the saddle is too hard to be comfortable.  On a long ride, however, the firm seat is actually  more supportive and comfortable than one that is more plush.  The Corbin saddle is made with a material called "comfort cell foam" that conforms to the shape of the rider's backside.  It has been my experience that  after a couple of hundred miles the new seat will actually "break in" and be more comfortable.  After installing the new seat I set out on a 3-hour ride and found that it was much better than the stock unit.  I found that I wasn't squirming in the saddle to get comfortable and as an added bonus I had much less tightness in my back. I like the appearance of this one too... Worth the money?   It is for me--it pays for itself on each long ride.