Sophie's place is great! It's clean, bright, and in a great location. We found that we could walk (or easily take the tram) everywhere we needed to go. The apartment is located really close the FoodHall which has a great selection of food and was just a great place to hang out.
I would note that the steps to Sophie's apartment are very steep (which is very common in Amsterdam) so if you have trouble with stairs, it might be an issue.
I would highly recommend Sophie's place!