I fitted one to Woodstock in the very early days of ownership and greatly improved the handling from pootling about and supermarket car parks, to speed hill climbs. It also stopped the propshaft hitting the tunnel when carrying a passenger.
Only downside is the need to look after two extra joints, but hardly an onerous or difficult task even with rose joints; a wipe over and a spray of oil suffices.
After fitting one and doing 20 miles, you'll not be asking "who needs them?" but "why didn't I fit one earlier?"
