While we didn't meet Eike in person, a chap named David met me promptly and checked me in, walking me through the property. Everything went very smoothly and I was very happy with the welcome pack which was waiting for me on arrival, consisting of some snacks and wine - very thoughtful.
The apartment is very clean and welcoming, in a great location, very close to the Diagonal Metro station. I would certainly stay here again.
One point is that shampoo and shower gel are not provided. Eike mentioned that these are not included in the offer because most people bring their own. As a business traveller I never carry these with me, so this was an inconvenience, but a very minor one.
Highly recommended.