I had a good experience with them as a new grad. A couple hours with TripleByte got me a free plane ticket to Silicon Valley, a hotel room, free Uber rides around the bay, and 5 on site interviews back-to-back. The product was an amazing deal for candidates. I had to do very little work and it got my foot in the door. 4 years later and I now work for Google in Mountain View.
TripleByte isn’t what they used to be, though. I don’t think they do anything close to what I experienced anymore.