I'm in Triplebyte's pipeline right now, and have had nothing but a great experience. The interview questions have been... not unusual? If people are complaining they're too challenging, I think I must have gotten lucky, because they seemed fairly normal to me. I believe my interviewer even told me that rather than finishing the whole programming problem, they were looking to see how far I could get and how I develop code.

It's been a great experience so far, even though several of my favorite companies in the pipeline have gone incommunicado before I could even talk to them :-/!