I stayed at Filip's for a whole month while doing my internship in Prague. I was pretty much satisfied.
The location is perfect, 10mins walking to almost every attraction you want but you won't be bothered by the tourists crowed.
The apartment is right next to the river facing the dancing house. The view is amazing.
It is also very close to public transportation.
The family is very nice and I like the privacy there.
Anyways, I highly recommend Filip's