arthritis in the knee

I had acl surgery in 2008. I have mild arthritis in my knee. My knee has been great. But recently i have been getting a popping just under my knee cap. I went in to my orthopedic surgeon for an assessment. He is suggesting i get Orthovisc injections. It's a series of three injections, one a week for three weeks. Its a type of synthetic lube to possibly stop the friction in my knee.

Any members ever have these Orthovisc injections? Did they work?

My other alternative is getting the knee scoped/cleaned via surgery. I'm leaning towards the surgery myself because the injections would need repeating about every 6 months.