I have a partially torn medial meniscus on my left knee. I have just turned 33. I had an MRI and my doctor seems very gung ho on having arthroscopic surgery. I have had this problem for about 2.5 years, and it isn't going away. I can't run or do any exercise that uses the knee, and as a result I keep gaining weight. I am wary about having the surgery. I keep reading stuff on the Internet saying that arthroscopic knee surgery is worthless, or makes things worse. So, has anyone had this surgery done? I feel like I have no other option but to go ahead with it.