I do use Moxy for the occasional mattress run or overnight (eg arriving near midnight at MXP recently), but anyone who stays 3+ nights there deserves some kind of award for endurance.

I remember a 4-night stay in AMS in Nov 2019. I'd booked the first two nights in the Moxy as AMS is seriously expensive. The first night the bed was so hard that I barely slept more than 3 hours and woke up with terrible back pain - the worst bed I've ever experienced in a hotel (brand or non-brand). I asked to move rooms for the second night and the bed was equally terrible - I had to take painkillers to get any sleep at all. Thank god I was checking out the next day

The second two nights of my AMS stay was staying in the WA using free night certificates (BMG). I still remember the look on the face of the front desk guy at Moxy when I told him I was checking out and going to stay at the Waldorf Astoria for the remainder of my trip

That's definitely the biggest gulf in class I've ever experienced when going from one hotel to another in the same city!