I've had 2 rounds of Orthovisc. First time they worked great, but just not long enough...only got a month or two out of 'em, but I've got too much bone-on-bone to ask for more I guess. I did a second round before a ski trip just to hold me over for the week so that I could give myself a steroid shot before the drive home....lol. It helped for most of the week. I know several people who have used Orthovisc and gotten a year out of it. Good stuff.
~dig