I've had my REV2 16 voice for close to 2 years now, and there are still a few things that annoy me on it. One of the most annoying ones is the fact that the DCOs are not free running all the time. For some unknown reason, the programmers have decided to reset the timers controlling them depending on how wide is the frequency gap between played notes. The result is an irritating "oscillators all starting in phase" artifact that is clearly audible. So when I want to create a smooth detune, it is destroyed by an occasional unwanted restarting of the oscillators, similar to a sampler playing back a sample always starting it in phase.
You'd never hear this in a fully analog synth. And there's no reason why the oscillator timers cannot stay free-running, and keep the detuning between them constant, without being restarted in phase with each other when the space between played notes is greater than one octave.
This, and a few other annoying quirks, are making me considering selling it, more and more every day...
Luckily, I have the OB6 which doesn't suffer from this...
Sorry for the rant, but as much as I try, this REV2 irritates me a little more every time I try to design a new patch on it. Even my other DCO based synth, the DeepMind 12, doesn't behave like this...