The location is the highlight of the place. You could do everything easily walking. Close to all transportation. The only downside is, if you like sleeping in this is not the place to be for now. All the streets around are under construction but since we wake up super early to enjoy the day as much as possible, that was not an issue for us.
Check in is great and Michael is a very good host. We will be 2 more nights in Vienna and if his place is available, for sure we would stay there again.
I totally recommend.