I have no experience with a 4 day work week at a startup, quite the opposite. The plain truth was that we needed to bring a product to market (it was a medical

I have no experience with a 4 day work week at a startup, quite the opposite. The plain truth was that we needed to bring a product to market (it was a medical device). It was an engineering office were we did everything from manufacturing to visiting exhibitions and talking to medical advisory boards. I even got my own smock and did test runs in hospitals and people believed I was a doctor. I also crawled on my knees in one of my best suits at an exhibition to fix a broken fuse for the device. It was more a 6 day work week, not the best work-life-balance. After it was established however, work was much more relaxed. I guess the question you should also ask is if the startup is already able to carry itself. If not, time is important and you should expect to work more than a comparable job at an established company. I am no workaholic, but it was a really fun time. Wouldn't want to do that all my life though. 4 days working is entirely enough for me for that matter.