How is Pramp for interview practice?

I have signed up with Pramp for javascript interview practice. Has anyone here interviewed on pramp before? What kind of questions are usually asked? Is it like the intermediate algorithm scripting challenges at FCC?

Used pramp three times…each time the other person did not show up, then you get put into a immediate pair session with someone random who has also been stood up by their partner…so you go from knowing your interview question, and language, to being put into a new room with someone, usually with a different problem and a different language (c++ in this case) and it ends up being a waste of time unless you make a new friend for the time you both wish to remain logged on.

I guess, once a boatload of folks use it, there will be fewer occurrences of the no-show, which seems to be running at 50% rate right now…