Hermann is very reactive, he asked us to call him (or send an SMS) 30 minutes before our arrival and he was already here when we arrived. He presented us with some information on the area as well as Vienna, which was very kind. He gave us a Google Map itinary to go to the subway to go to Vienna (Simmering station), we did it once but it's not nice to walk by these streets. We looked and find a nicer walk, it only takes like 1 or 2 minutes more than the initial Google map, Here it is : https://www.google.fr/maps/dir/48.1692797,16.4222525/K%C3%B6lgengasse+13,+1110+Wien,+Autriche/@48.1712625,16.418803,16.71z/data=!4m9!4m8!1m0!1m5!1m1!1s0x476daa04641f46d1:0x3c3cc16b7bbfdcfb!2m2!1d16.4249037!2d48.1748698!3e2. The place is really quiet, it was also nice to "go home" and see a nice garden. You can even have your dinner outside surrounded by nature (there is a nice table in the garden, just below a beautiful tree) which is a real constrast to the noise we can hear while in the city ;-).