It does exactly what it's supposed to do. I've been using it as a reverb when I don't have one, and I throw the thing into a feedback loop sometimes just to toy with it as a single channel synthesizer, which it handles pretty well.
I bought this one from Amazon and was quite pleased with how it sounded. It went in Oscillation quite fast, so that's the reason I actually traded it for its digital counterpart, the Prophet.
Growing frustrated when she couldn't find an affordable analog delay for her small budget at the time. Leanne started using this 300ms out of lack of quality affordable options that fit her needs.