HI!
I had this operation done about 6 months ago, I was a keen weight lifter, had trouble 3 years ago, not alot of pain but it did hurt, I was told it was tendonitis and put in a splint for 2 weeks, it got better, but kept coming back, eventually after 2 1/2 years of pain I got referred to a specialist who said it was a S-L tear and I needed a reconstruction.
The pain is much reduced, but you need to be aware the reconstruction many stretch over time and therefore not be as useful as it was in the beginning, the next step is another operation, i think my surgeon said it would be a partial wrist fusion which would stop any sort of weigh lifting for me.
At the moment I have 60-70% flexion and 5% extension, the surgeon thinks the extension will increase more over time as everything is still bonded VERY tightly right now, so I can possibly expect 50% extension max, flexion should get to around 80% when things are fully mobile again.
With this op, I was told, it's a big op so if you can manage without it then deal with the pain, however as my job is a fire fighter I needed to be able to use my hands without pain, so I took the chance and it seems to be doing OK, i start back on full duties in 2 weeks!!!!
Think hard before having the op mate and you should protect your new wrist as much as possible when using it, remember the wrist you have today is the one you will have for the rest of your life!!