First off, Ingrid is lovely to deal with, and the flat is very clean, modern, and smartly decorated. It was a bit hard to find, but Ingrid was very helpful in guiding us there. A couple of our Uber drivers had some issues finding it as well.
The location is just off Oxford street and right next to the Bond St tube entrance, so there are loads of shops and restaurants around, so hopping on the tube is a snap and it's geneally a vibrant, bustling area.
So why 3 stars? We had major shower problems during our stay. For the first couple days, we were able get hot water intermittently in the shower, but we'd generally get it for a few minutes max, then it would turn cold. Not ideal, but we just dealt with it (along with it draining very slowly). After a couple days, we could almost never get hot water in the shower. To her credit, Ingrid was responsive when I alerted her to the problem, and they came out to try to fix it. They fixed the clog, but weren't able to fix the hot water issue, which was the biggie.
Standing in front of the shower just hoping the hot water would work (and it actually not working) really effected our stay in a negative way. If it weren't for that, I'd certainly give the flat a higher rating because it definitely has some great things going for it.
The other things to be aware of are: 1) there are really no spare linens to speak of - our daughter needed to sleep on the couch one night, so we had to run out and find a blanket to purchase. A few extra towels and blankets would be helpful.
2) the flat is on the third floor and there's no lift.
If the hot water is working properly in the shower, and your expectations are in line with the other more minor issues, you'll certainly have a nice stay at Ingrid's place!