After mine and my boyfriend's 4 night stay, we are pleased to say that Tycho and Justin's space far exceeded our expectations and ultimately enhanced our visit to Amsterdam! They have fantastic taste in modern, eclectic decor, and considered every detail towards comfort as well as aesthetic appeal. Though it's just a private room, it's so spacious and secluded that it feels like you have a whole apartment to yourself. And if you're worried about the open concept bathroom - don't be - there's another bathroom with a door just outside the bedroom.
In regards to the floor-to-ceiling window/door, it does not open, but Tycho said we were welcome to the rooftop patio through his living area whenever he was home.
Overall: check-in was a breeze (even when we arrived early), the space was clean and bright, and Tycho and Justin were thoughtful and offered great recommendations! If the opportunity ever presents itself again, we would love to stay with them once more.