We stayed at Erdbergerlande 2 in Vienna for 18 nights in Aug-Sep 2018. Some things about the apartment were very good but a few details were annoying to unacceptable. The apartment is spacious and most facilities we needed were provided. It is very close to S1 tram and to 4A bus, so getting to city centre in 10 minutes was easy and convenient. We had not realized there was no washing machine in the apartment and probably that was not advertised as being present. But it would be so easy to provide one. The large bathroom has a space for a washer and the plumbing is installed, so it was bizarre not to find one. We never met Harry, but he told us there was a washing machine in Marxergasse, some two blocks away. Not at all convenient, so we ended up[ hand washing our clothes.
On check-in Harry's driver, who picked us up from the airport, gave us just one key. For two families of four people all doing their separate things, one set of keys was inadequate. Ideally we needed four, and we asked Harry for more. After none had been offered after 24 hours we had to get a second set cut (cost 85 euros) which eased the situation.
There are 3 TV sets in the apartment. The one in our bedroom (#2) was kaput and I told Harry it had broken down, but no-one came to fix or replace it. The TV in the living room did work on one channel, but we never got it to change to another channel, in spite of playing with the remote for an hour or so. As for the TV in the main bedroom (#1), we never got to try it.
The layout of the rooms in this apartment is quite bizarre. Access from the main bedroom to the living room is through bedroom #2, which is not that great when there
are two separate families in residence. The small 3rd bedroom also has no access to the main passage and bathroom except through bedroom #2.
When we arrived there was only one roll of toilet paper so we naturally bought many more rolls. It would have been nice to have had more. Half way through our stay we asked Harry to replace the bed linen and towels, and this was done by his cleaner, so that saved us hand washing of these large items.
Harry generally responded to email queries within 24 h or less, but his replies were often less than helpful, and the issues of keys, TV sets etc were not properly addressed. When we left, Harry's cousin drove us to the train station and he happily paid us 50 euros for the extra set of keys, so that was appreciated.

Overall this was a good apartment for four people, but with some obvious deficiencies. If they were to be corrected, it would be excellent.