Very nice stay and very nice host! We enjoyed staying at Alexander's flat which was very conveniently located near to the city centre and where we could have our own space in the fridge and kitchen. The flat was super clean and the WiFi was great. We couldn't hear Alexander at all - but due to the heatwave we either had to have the AC on all night which was loud, or keep the window open all night, which was also loud ! Also, one side of the bed is quite squeeky if there are 2 people sleeping :) Thankfully we are quite deep sleepers.
Apart from those 2 things everything else was perfect and I would definitely recommend Alexander's place any time as he is a very friendly guy!