A few issues that made our stay less than perfect - there was no 'book' and we would have loved a book with local guide to shops, cafes, public transport etc, but didn't want to contact the host every time we wanted advice.
The house is older than expected which meant doors to the outside didn't open from the bedrooms, the front door was very hard to push open, the lock box was tough to open, and it was lacking a few things we hoped for - like a selection of games and puzzles for our kids to play with, laundry powder (though we completely understand it's a consumable and up to us to buy); and the dishwasher didn't work, and we could hear every step the neighbours made upstairs..
On the plus side, the location is fabulous, the beds were made up beautifully, the place was clean, and the host was responsive when we did have questions.