The build quality is outstanding.
The soft keybed is pleasant (with expressive enough aftertouch) and makes for a good master keyboard.
The programming of sounds is about as clear as can be.
While the VCOs, VCF and VCA are analog, modulations are digital: that's the simplest way of building the kind of extensive modulation matrix this synthesizer sports. That's excellent for flexibility, but it tends to make audio-rate modulations sound duller than if they were fully analog.
Other synths of this brand have fully analog modulations, and thus sound better, to flexibility's detriment.
The same can be said about effects like distortion, or the high-pass filter for example: some DSI/Sequential synthesizers offer these as part of the analog signal chain, but this one only offer them as algos in the digital FX section, which comes with inherent limitations.
All in all, this compromise helps keeping the synth half affordable while amazingly featured.