Overall the apartment is very nice, though it's separated by a very steep spiral staircase which makes it difficult (and noisy) to get between the "master bedroom" area downstairs to the living/dining/kitchen area upstairs. The stairs are very creaky so it was impossible for me to go upstairs without waking my wife up in the morning. I understand this is the traditional Amsterdam architecture, but it's not very convenient, and I'd personally much prefer a one-level place. The king size bed was wonderful (and unusual for Europe, in my experience). However, it doesn't provide much privacy if you have someone staying in the second bedroom since the main floor mostly consists of the master bed, and is open besides a privacy screen. The second bedroom is much smaller, just a bed and not space for much else -- the second bedroom also has a window out to the street, so it's a bit louder than the main bedroom which backs to the garden/backyard area inside the building.
The use of a third party (The Friendly Host) for check-in, check-out, and any local needs wasn't very convenient and we not good at communication. They emailed me weeks prior to the stay telling me that they had arranged for an (early) 2 PM check-in. Then texted the day of check-in when I landed in AMS to notify me that check-in was at 3 PM and I couldn't do earlier. I begrudgingly agreed to 3 PM thinking we could wait in a nearby cafe, and then had them text that they could meet at 2:30 PM -- though they didn't arrive until around 2:45 PM. Not a great start. The person checking us in clearly wasn't familiar with the apartment. They tried the wrong outer door, then sent us all the way up the stairs to the wrong apartment door. Once they finally figured out the correct door and key, they let us in, only to wave around the place -- not even showing us the upstairs -- before leaving.
We sat down on the bed ready to take a quick nap after a long trip, but noticed multiple hairs over the supposedly clean sheets. I sent a picture to Gordon via the AirBnB app, and never got a response back. However, a couple of hours later, while my wife was naked getting out of the shower, someone from The Friendly Host let themselves in the front door without knocking or anything, and poked their head in to ask if they could come in. The bathroom is right there by the entrance, so my wife was freaked out about this strange man coming in the place when she wasn't even dressed. I heard all this from upstairs, and came down to let him in to change the sheets. This may be normal/acceptable in Europe(?), but my wife was not comfortable at all. This would have been so much nicer if they could have communicated ahead of time, and then actually knocked before entering.
Besides the rough check-in experience, we enjoyed the apartment. The split level is not super convenient, but it does give a large upstairs seating and dining area, which was nice. The place was very quiet, much better than places you may find closer into the canal rings. There are a ton of great shops and restaurants within a couple blocks walking, including a grocery store, so no complaints there.
Check-out was listed in the listing as 11 AM, but we received a notice the night before that they expected us to check out at 8 AM. It wasn't an issue for us, as we had to leave by then to catch our plane, but I didn't appreciate the last-minute change, and the assumption that we would be out so early.
Overall: nice place, but wouldn't stay again due to poor communication, last minute changes of check-in and check-out times, and inconvenient split-level.