I put over 3000 miles on my Luna since May and she was having problems shifting. I changed the drive train, cleaned and regreased the pulleys. I had my LBS put the chain on and adjust the derailuer(sp?) and now she rides amazingly. I also got new tires which totally changed the ride. I really didn't believe they would make much of a difference, but I was wrong. It's like having a new bike again. And I love doing as much of the maintenance as I can (and as my partner will help me with) myself. Love that grease!