Gregv here, if I may contribute my 2 cents. I am 12 weeks post op Stablyx on my left hand, and am glad I did this. Most of the swelling is down, a little around the palm side, most dexterity is back, pain level (when I bend it just wrong) is about 3, and I have about 80% of my pinch strength. My hand continues to improve, a little each day. My surgery (done at UCSF) also involved cutting part of the fcr tendon because it apparently gets in the way of the implant. I have not had any loss of mobility because of that. I continue to follow my PT's recommended exercises every day, which have backed off a bit, and at this point there is little that I cannot do. My right hand is getting to be as bad as my left was before surgery, and currently my Stablyx hand is in better shape than my right. I climb at a rock gym for fun and exercise, and I am back to doing that, as well as building a tiny house with my daughter.
I appreciate that the Stablyx procedure does not have really high reviews, but to me it was definitely worth the risk. I wanted the best option to get full use of my thumbs back.
Mayo clinic conducted a clinical trial a couple years ago, but for some reason they will not publish their findings. Second opinions, searching out more experienced surgeons, unfortunately likely involves extensive travel. I am in central Oregon, and the closest surgeon for this procedure was in San Fransisco.
It is not successful for everyone as can be seen in some of the previous entries, but I will likely have my right hand done when the time comes.
Take care, and good luck.