I earned the ERPA after the QPA. I am a bit resentful of the automatic granting of a QPA more so because the QPA and its entire series of examinations, IN MY OPINION, lends more credibility to a professional's understanding of practical plans experience than cramming for 2 exams to get a designation. I am currently studying for the proctered CPC exam in June.
As a side note, I work for a law firm. On many of our client's 2848s I am the 3rd representative behind 2 attorneys. I found out the hard way that the IRS only recognizes the first 2 representatives and will not speak directly with the 3rd. Insane that they even have a 3rd option.