My GCG350 failed after 3 yrs. It suddenly started to behave erratically, would start closing and immediatly open again. I found that the solder joint to the transformer on the control board became loose. After fixing that it still failed. Eventually it failed to detect the open limit switch and the motor took all the chain in, locked up and broke a plastic piece! The end. I think my old Craftsman lasted 30 yrs and I changed that poor thing 'cause it didn't have a remote...