I use the ePari for study medication (or placebo). It's provided by the study. I don't get to keep it (I already asked). I can totally understand spending the $$ to have a really quiet and fast machine, it's night and day from others. You do have to boil the equipment every day and the protocol I'm on has us replace the little screen part that goes inside the handset once a week.
The power cord started getting wonky on mine at 9 months. The study replaced it.