I recommended this apartments. It has some little minuses but they are really very little :)
+
1) Host answered every question very quickly
2) Apartments were very clean and warm (it is very important if you want to visit Vienna in winter)
3) You will have everything you need for your life
4) Location is very good
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1) We had some problems with wi-fi. We had to use it only in one gadget. If you try to use it in two gadgets you will have problems with connection
2) We had some problems in bathroom - water didn't disappear quickly