My boyfriend and I stayed at Mimi's place and loved it! It's only about a 10 min walk from the main train station, and you can walk to pretty much anything you'd want to see. The space is super cute and clean. It feels like a really authentic Amsterdam building, and being above Mimi's shop was a really cool touch! Like others have mentioned, you'll need to walk up 2-3 flights on a narrow spiral staircase to reach the apartment, so if you have mobility issues or don't want to drag a big suitcase up that far, it may not be the best fit for you. Though we didn't mind it!
Mimi herself is so nice and easy to communicate with. She met us when we checked in, showed us around the place and gave us some recommendations of what to check out nearby. I'd definitely stay at her place again in the future!