Our stay in Amsterdam only lasted three nights but it was a memorable experience for bad reasons. During our stay, the temperature in Amsterdam was consistently 30° at a high, our room was at the 4th floor with no air conditioning and facing the afternoon sun. Our room became an oven in the night time that we had no choice but to stay in. If not for a hard-working fan in the corner of the room we couldn't have stayed there without risking heat stroke. On top of that, there was no elevator which is mentioned no where on their Expedia page.
We paid about $600nzd (~€300) for a twin room which was more cramped than a shoebox, and not at all what we expected from the photos on Expedia.
The staff were lovely and helpful, and the location was very good. But if you're coming to Amsterdam in the summer or the early autumn stay away, it's dangerously hot.