I used them two times. The first one was very early on, where I was given a home assignment and interviewed on it by Aaron himself, if I am not mistaken. The dude was awesome at interviewing, and knew exactly how to probe to get a better understanding of your skills.
That was when they were promising that you can interview with them so you don't have to do technical interviews with the companies. I thought it was an awesome concept and could really reshape hiring in the tech industry.
Second time was a couple of years ago, where the model has already changed a bit. Passed the first round and one of the companies that I could interview for was triplebyte themselves.
What a disappointment! The only difference in the interview process than the rest of the companies was that they gave you a laptop and asked you to do practical coding instead of whiteboard generic algorithm solving.
Some of the interviewers themselves were junior members of the stuff with 0 experience in interviewing.