I did Brisbane-Sydney on my stock 2005 seat in 11 hours, 1000km, 600 miles roughly , and didn't get sore at all, ( at 120kgs...) so its comfy enough, but I could do with it being lower or slightly less wide.....there's some parts on ebay including a Aus made seat atm I might look at ...other wise I'd consider a Corbin, but I don't like the 12-16 week wait from the local(ish) supplier....