We did tightrope with our GSD mix a little over a year ago. We were very happy with the results. It seemed like once it was all healed it knocked 4 years off her age.
The recovery is really tough. Keeping them still and from jumping around for that length of time is really hard. They want to start using the leg way before they should be using it. The first few days we had her on a sedative to help keep her still. We ended up using a towel under her belly to support her instead of a harness. We also got a therapy vest from Orvis that would hold an ice pack right on the knee. We were fortunate in that any type of clothing pretty much turned her into a statue.