Yes, I have. It isn't bad if you know what you're doing on there, but a must is to know a lot of websites. If you don't know a lot of websites, it's boring.
I've been on there using TOR but its low as fuck and i didnt know any sites to go on except silk road or some shit.
There's a bunch of markets that have risen to take the place of silk road. Alpha Bay and Nucleus are ones that come to mind, and then there's Agora but they aren't taking new registration yet again (a sign that they're under attack from LEO) and only a matter or time before it get's busted like SR2. I think it's pretty interesting the things that are available though.