Wow, This synth was a pleasant surprise. When I read the feature list, I pretty much ignored it, since it did not seem to offer anything new, but after hearing people talk about it, I downloaded this beast. Wow. Simple interface, but extremely function, this is a monosynth, which has one great asset. The way it sounds!!! IBlit sounds extremely warm and mmmm, vintage. It also complements the more "in your face" character of Triangle I and II perfectly and is currently my preferred synth for analog-style basslines. The presets provide a very good idea of the way the synth can be used. I have not had to use the documentation or customer service, since I have not had the need to, as Iblit is about as intuitive a synth as it gets. Everything is neatly laid out, and easy to understand. The portamento is sweet, as are the filters. As funky mentioned, there seems to be no hint of aliasing.
The one big negative is a lack of MIDI control. This synth would really do well with MIDI learn.
If you haven't, try Iblit out. It is really worth the time.