My husband has part D with his Humana Medicare PPO and used it for the first time a few weeks ago... Humana's PPO has been great and it's only $45 a month over the Medicare premium. We got mainly for the hospitalization portion. Granted some retirement plans still have good prescription coverage, my own does, but a lot of them dropped their retirees (I personally know several this happened to) and for them this has been a help.
I bill for a doctor and it's caused confusion among the Medi-Medi patients and just caused confusion, didn't save them anything and there is only a small percentage of patients that didn't have a secondary with insurance coverage.
Yes, I was fortunate. I thought my prescription coverage might be dropped. A lot of employers did that, I think, since medicare prescription basically allowed them to weasel out of it and save money.