It is a very nice apartment, right in the center of Prague in a quiet area.
I stayed at this apartment for 1 week and I didn't had any problems with heat or hot water.
It is suitable for longer trips because you will find there a washing machine, fridge, stove.
It would be nicer if the landlord gave us more than 2 big towels and 2 small towels for the whole week.
The sheets were clean but I noticed some stains on the blankets that could be removed for hygiene purposes.
In the bathroom we had shower gel and shampoo.
Overall it was nice. :)