I have had both knees done, and the only drawback I have found is that I can't kneel down so it's not so good when it comes to certain jobs such as dusting or washing skirting boards. Apart from that it has been a positive thing, no more crippling pain in my legs, and also the back pain I got when I had to stand for any length of time. I didn't want to have the spinal injection, but I was coaxed round, and it was great. The first time I fell asleep during the op, the second time I was asleep before the op started and woke up while the op was still being done. Spent the time till it was finished talking to one of the nurses. Nothing to be afraid of. Really worth having it done.