Full disclosure, I didn't get an offer and was rejected after the second stage, but I don't want this to be read as a salty review. I'll be honest and give my opinion which is that the interview process is too long and the recruiters are very far removed from the role itself which makes miscommunication easy.
The Talent Acquisition Manager described the interview process as follows in addition to an initial chat with them:
Product Showcase - 1 Hour
Insight Gathering - 1 Hour
Strategy Workshop - 1 Hour
Meet The Squad - 45 Mins
Final - CEO / Snr Prod Eng member - 30-45 Mins
This is c.5 hours of interviewing not including the prep time required for some of the presentations. I'm sure it works for them, but in my opinion and also comparing to the rest of the industry, it seems excessive. In any case, it's very onerous on you as a candidate when you have a full time job to prepare and make time for all of these interviews.
The insight gathering stage is also a live exercise where, under time pressure, you will need to share your screen and work through a few problems whilst they watch/help/ask questions. This isn't inherently good or bad, I'm only pointing this out because I know a lot of people dislike live exercises.
The Talent Acquisition Manager pushed to get these interviews in back to back as fast as possible, even after I mentioned that it will be hard to do more than one interview a week with the necessary prep time around work and other commitments. Unfortunately they also didn't seem to understand much of the job itself and, in my opinion, accidentally misconstrued certain aspects.
The product people I interviewed with (the CPO and a colleague) were excellent and I have no doubt at all that Triptease run a very efficient product function with very smart people in there. They are free to run their recruitment process as they like, but personally this was an overwhelmingly negative experience.
If you have the time for 5 hours of interviewing, plus prep time, and are okay with live exercises, go for it.