Nice filter, sterile but strong oscillator, one of the tightest envelopes found on a synthesizer and a very good LFO. Actually this synth taught me why analog envelopes and LFO's have a distinct impact on your sound as well. (probably modern digital modulators can be very good but the vintage digital ones are not)
Still love the way you can let this thing smoothly erupt from a muted squelchy acid lead to a full blast PWM+Sub dominator sound. Probably you'll be doing just that for hours on end once you've bought it and never get bored.
It's not uncommon to see people that had access to them while they were still dirt cheap to have two 101's and a 202 or something in the same studio.
That said, for $800 you should start to consider new synthesizers instead. Just $200 more for a SubPhatty. Or a MS-20
mini and a few lapdances. Perhaps the 202 for $500 is the biggest steal of the moment. Grab them before the internet wakes up from it's "it's not a real 303 and the sequencer sucks" coma.