I used to gig a Roland Sound Canvas SC55 Model (an older one than yours) back in the 90s, after a friend who ran a home recording studio introduced me to one. It was like having one of Roland's JV type keyboard sounds in a little box.
The first SC models came out just around the time that the MIDI Instrumentation Standard (GM) was founded. So it was the first synth or module I ever owned that had all the sounds organized and categorized into groups (i.e. Pianos, Organs, Synth Leads, Synth Pads, FX, etc.).
It had very limited editing capability (mainly you could adjust envelopes and a few other things). No deep editing of sounds. You got what you got.
Back in the day, it sounded pretty good... but quality of its sounds has long been surpassed since then (especially the "organic" sounds like Piano, Organ, EP).