I stayed in this apartment with 5 friendas. We never met Guido but Christine received us very fondly, she even waited for us at the corner and guided us the right way. She gave us tips for our stay in Vienna. The apartment was excellent for six people. The kitchen was well equipped although it didn't have an oven. The beds were confortable. It is a little far from the city centre (30 minutes) if you intend to avoid public transport (especially because the Tram has a bad frequency) but it is not that bad. Our stay was really enjoyable. The quality/price ratio was perfect. We hope to visit again!!