I've had several Zoom multi fx units over the years, both for guitar and bass. I think they are very good value for the money, especially if you like ease of operation. I sold my Zoom B3n simply because I had GAS, and wanted to try something else. I currently have a Line 6 HX Effects, which I think is very good indeed.
In my experience, one just gets used to the necessary methodology for using each one. It doesn't take long. Plus, editor software makes the creating and storing of settings very easy.
BTW, I chose the HX Effects over the HX Stomp because it already has six foot switches, and so doesn't require an additional foot switch for scrolling etc. Also, I didn't need the amp sims. I think a lot of it is down to whether you like the effects sounds that each manufacturer offers.