The location is not bad at all, indeed next to the metro which was very useful. It's listed as Entire Apartment and that I guess happens only if the host is out of town. We got one room in a two-rooms-apartment, host was in town and, when at home, she has to go trough your room for anything (ie. to work at 8 in the morning).
She's very communicative and willing to help and that's great if you need that, not so great if you just want to enjoy Prague undisturbed, not a big deal breaker still.
On an all, depends on your personality or how you prefer your vacation - or if she's in town or not, she'll be a great host or something you might rather not have to tinker during your vacation.
PS. Prague is great nevertheless, enjoy!