I have the Coway BA-13. I paid 500.00 for it but it is an awesome one. I have tried cheaper models but there was no comparison. I have 2 of them actually. One at home and one at our weekend get away. I think they are lifesavers (or buttsavers I should say). I honestly don't know how J-pouchers can do without one. It has made a world of difference for me and my recovery.