Having lived in both Karratha and Port Hedland for a total of just under 4 years the seat suffered from heat damage over time plus general wear and tear. Getting a new seat was decided but not until we left though I did look online (E-bay mainly) and decided on a gel seat.
The OEM seat was ok for short haul trips of about a day but buy the end of day two something better was needed but I'm reluctant to replace stuff that is still good to use so in July 2010 I ordered the seat via E-bay for about $500 delivered and had it sent to my dad's place for when we got back to SA.
In November 2010 the new seat was fitted after my move back here.
For day trips to the city (Adelaide and back 500 km return it runs rings around the OEM and the longer trip to dad's in Loxton (600 km ret) is still good. For added comfort I made up a goat skin seat cover for it which improved our seating above and beyond what we had before.
Heather isn't a regular long distance like I used to do. Only a trip from Karratha to Perth (3200 ret) plus a couple shorter 1000 km trips. Our last longish trip together was trying for 2012 border ride and also our first almost whole day of non-stop riding on the gel seat. 600km neither of us complained from painful rear ends. I took sick overnight and had to return the 600 km home meaning 1200kms over two days and saddle sore was almost a non-issue.
The seat is shaped so that I sit back further than OEM so my knee doesn't hit the filler panel anymore. I sit a little lower and Heather sits a little higher. The seat looks a little wider but that maybe just the shaping for the pillion. The leather used is good quality but the colouring though not fading seems to be affected a little by rain drops. But a polish every few weeks keeps it looking good.
Though we do have the seat cover I don't use it if it looks like rain and most times at home the cover is in storage. On a hot day ride I put the over on and leave it on until it looks like rain again.
The next (on hold depending on work application outcome) planned trip (950km) is to the rally so it'll be another tryout distance wise for the seat.
http://www.saddlemen.com/products/k2mart/seats/sport-bike-seats/stealth-seat/stealth-seat-st1100-a.html