This is a phase, with a dual speed function (so you can go from slow to fast and back, ala Leslie cab), and with a volume sensitive setting, where the speed of the phase changes depending on how loud you play. It's a very musical phase, like a Phase 90, with no provision for feedback. It would be pretty useless for hard rock, but for blues, and lighter rock it sounds really rich, and a pretty convincing Leslie thing.
Reliability/Durability:
Same box as a Boss CE1-heavy, cast metal, I suspect you could pound nails with this thing. It's 20 years old and works perfectly, definitley hardier than most EH pedals.
Ease of Use:
3 knobs, 3 switches. You get good tones right from the start, and it's all pretty self explanatory.
Customer Support:
Do they remember that they made this? Do they care? No idea what would happen if I tried to get support. I've heard wait times can be pretty bad at Roland.
Overall Rating:
A great vintage effect. If you ever see one, that'll make two of us :-). Buy it!