Andy was an exemplary host, extremely helpful and completely respectful of our privacy. The communication between us was smooth from the reservation till the arrival (he booked a taxi for us) and he gave us loads of suggestions on public transport and places to visit in Prague.
I have just one negative note, which is not Andy's fault but, however, a very unpleasant point in our stay so the future guests need to be informed about this: every morning there were workers in an adjacent flat using hammers and drills for hours, even on sunday morning, from about 8:30 until 12 am. So, if you're lanning to sleep in a little bit, it may be better to ask in advance if the works are done.
Also, we couldn't manage to make the TV work in spite of the clear guidelines left by Andy. So if you are not very good with technlogy as we are, I suggest asking Andy to show you the several steps to follow when you meet him at your arrival. For us the TV was not important so we didn't even call him asking for help actually, but maybe you're more interested than us.
Hope this helps, cheers