I just had my port revised in July. I had the band for 22 months before having a problem. My problem started with pain around and deep into my port site. I then started noticing that I was eating more. The revision went well. There was basically no pain. I was camping in a tent 3 days later. I have BC/BS for insurance and they paid for everything. I had to have an endoscopy and some fluoroscopy also.
Slowly I've started to have some restriction, I've had 3 fills since being replaced.
I've heard that insurances will pay for the revision much easier then replacement of the whole band.