I put a pair of Progressive 440's on the bike back in August and my initial impression was that they were better than the standard shocks, but not worth writing home about. Then over the winter the chrome peeled off so I was even less impressed.
I emailed Progressive Suspension and they gave me an RMA so I took them off and sent them back. I put the stock shocks back on and the difference was amazing. These things are wallowing and bottoming out like crazy. I want my 440's back - preferably with chrome that doesn't come off.
It does make me appreciate the quality of Triumph chrome though.