For anyone who loves that synth, I really, really recommend to head over to developer's site, find his Dropbox and download JX8PBNK preset banks. They are amazing. Simple, beautiful, characteristic, effective.
This thing is astounding. I have a real JX-8P, did an A/B comparison of patches, and this VST is like 95% there. Pad and string sounds are the best, they're almost indistinguishable. Brass sounds aren't quite as perfect, but still sound great in their own right. Some patches that make prominent use of the LFO, and especially high bell-type patches, were fairly obviously not alike, but still very close. The plugin on those patches sounds brighter and too precise (for lack of a better term), The real JX-8P's LFO seems lazier, as do the envelopes. This emulation even emulates the little sound the gate makes when it closes on some patches. All in all, as good as commercial stuff, easily, and probably the only way you're getting the classic Roland sound in your DAW these days (affordably, anyway).
In the late 80s/early 90s I owned a much-beloved MKS70 and the PG800 programmer. I'm pretty familiar with the sounds of the JX series, so I'll just say that I love this plugin, and that the other reviews are spot-on. Btw, I'm not running Windows here, I'm a Linux guy using the plugin with the excellent Airwave bridge. Works flawlessly in Bitwig for Linux.
This is just a beautiful synth! I'm Amazed that it's free/D.W. I love the classic Roland sounds, and this seems to nail those. It's very analog-y. So many great patches available, too. And...midi-learn-that's always a clincher for me. Along with low CPU usage, 64-bit availability and inspiring GUI, it's become a definite favorite of mine. Thank you very much Mr. Luders.