This thing gets snuck into more tracks than I'd like to admit. Even just the first dozen or so sounds are beautiful and absolutely worth it, beyond that you'll find tons of great pads, leads, crazy synth sounds, and lots of other patches that are very usable to this day.
It's very affordable and gives you instant access to all the classic (but somewhat dated) sounds of the Wavestation. This is not an all round powerful synth but a very good emulation of the best selling romper synth with vectorsynthesis and wavesequencing features (and it even includes all the official expansion cards). The Wavestation is best described as M1/T1 meats Dave Smith (Sequential Prophet VS) and has been heard on many classic records. And this time it's in a really affordable package.