We didn't meet Petra as she wasn't around the weekend that we stayed but check in was easy with a key safe outside and good communication from Petra with the code etc.
The studio apartment itself was perfect for our short stay; Petra has a folder with tips and notes for your stay which is very helpful. No oven or freezer, but for our short trip a microwave and toaster were fine for us. The bed is very comfortable; I was finding it difficult to get up in the morning! We couldn't work out how to turn on the heating as it was quite a cold weekend but Petra had clearly thought of this before and had a large blanket on the sofa.
The apartment is very close to transport links, with a tram stop only 4 minute walk away and a bus stop just around the corner. There are plenty of restaurants near by and a supermarket only 10 minutes away.
We had a great stay and would definitely stay again.