This is one of Dave Smith's earlier synths and it is a real classic. It's sonic capabilities are daunting. Everything from mellow atmospheric evolving textures to wicked FM synced madness. It's ability to process stereo audio signals is a rare feature. Programming it is "meh" but with the editor it makes it much easier. I'm keeping mine until it just breaks.
I am a huge fan of Dave Smith products and this is a gem and is one of my favorite synths of all. I own about 100 different keyboards from various companies, and this is in the top 5!