This is one of my favorite synths. Don't let the simple 'old' interface and limited controls to fool you, as there are lot's of sound design options if you know how this synth work. The prophet is really a fun synth to learn and teach synthesis with all the ingredients needed.
The filter sounds great and really give the growl expected from it.
Of course it's not just the Prophet 5 but also Prophet VS and the combination of both. This can produce modern sounding patches with ease and joy. To me this is really a playground.