Operating the Korg MS-10 is probably going to take a little bit of time to get used to, but of course that all depends on your level of experience when it comes to analog synths. If you've never used a synth patch bay before, there's definitely going to be a little bit of a learning curve here. Otherwise, the parameters are broken up into easy to understand sections and shouldn't be too hard to break it all down without the help of the manual.
The sounds heard from the Korg MS-10 have made it a popular vintage analog synth for a reason. While not as versatile or complete sounding as a vintage Moog, it's got it's quirks and specialties for sure. I like it a lot for it's bass sounds, but it's got some nice leads on here as well and definitely covers just about everything in between. As with all analog synths, it really just depends on what you can do with it, as the MS-10 is certainly capable of getting all sorts of awesome analog synth sounds.
I don't know readily available the Korg MS-10 is nowadays, but it's still a great starter synthesizer for anyone who is interested in analog synthesizers, regardless of your level of previous use. I really like messing with the MS-10 because it's about as simple as you'll find a true analog synth and really has some awesome sounds. The MS-10 isn't going to cost you nearly as much as some other vintage analog synths will, so it's definitely an option worth considering for anyone in the market for an awesome analog synthesizer.