Compact, lightweight and sturdy are a few words to describe this module. I've been using this for a year now on rehearsals and gigs without a sweat. Using custom samples (based on following the requirements for bit rate, file type etc), saving and customizing presets, and switching between presets are super easy.
Someone spilled almost a full glass of water on the module during changeover on one gig, I pulled out the batteries and let it dry for a day or two, still works perfectly. This is Rolands quality at its finest, would probably survive a nuclear apocalypse. Been using it with Roland RT-30K and RT-30HR without issues.
No wonder its used by "everyone" who triggers.