We had a great time staying at Charlie's.
The apartment is just as described and very lively. It changes from the "rental only" kind of generic places you can now find on AirBnb. There, we felt like real Amsterdammers, even if only for a few days.
Taking care of Coco the cat was a first, but she is not high maintenance at all!
Regarding the neighborhood, we really loved De Pijp. You can find everything around the corner, from nice little restaurants to parks or even a florist. It is walking distance from everything, really, if you feel like wandering around in Amsterdam. We practically didn't take the public transportations. But they're close if you need them.
I would definitely recommend staying at Charlie and Coco's place!