Olaf was helpful in coordinating the initial logistics of his listing but where it fell apart was the accuracy of his listing. Upon arrival in Hannover, Olaf directed us to a different location, not the one listed -- which was about 1/2 hour away from the listed location. We had to alter our daily travel arrangements because we were not centrally located as we would have been at the listed location.
Additionally, where we ended up staying was not an entire home/apt as listed. We stayed in two rooms with a very nice German couple and they were very helpful (even gave us a ride into town on the day of a transit strike) but again, the accommodation was not as listed.
In the end, it all worked out but we had to make adjustments that were not anticipated. It would have been even okay if Olaf would have just said, the original location is not available but I have an alternate that may work for you. Perhaps that was just the language barrier. Hate to give a low rating but it was all about the accuracy of the accommodation. The original location was perfect for what we needed (very close to Hannover Messe) but we ended up in a remote suburb. Unfortunate.