When we COS'd we were given the option to sign up for up to 18 months of AfterCorps health insurance.
Price: As senior citizens we thought the price was excellent (about $225 per person per month). Some of our younger friends thought the price seemed high to them.
Service: I only used it once to have a prescription filled, and had no problem. My wife, on the other hand had a lot of problems. She had some surgery and there seemed to be no end to the hassles. There was a lot of confusion as to which forms were needed to be filled out. There was a lot of confusion about which treatment was to be covered under Workers Comp and which was AfterCorps. Aftercorps made payments to providers very slowly and in one case to the wrong doctor. We were not happy with them, and were glad to drop them when we got a job that provided health insurance as a benefit.
I heard a lot of other negative comments from other RPCV's that were in our group.
Shortly before we dropped AfterCorps we got a letter from them stating that they were going to drop us (and everyone else) anyway because under the new health insurance law we would have to get our insurance from one of the new exchanges.
So, bottom line, AfterCorps sucked but the price seemed good (for seniors). If it is still available when you COS you should take it unless you have an alternative.
Are they even offering it now? I would love to hear reviews from other RPCV's about AfterCorps.