Efi provided an abundance of relevant information at each of our site visits. Her English language skills are excellent. Even my deep South USA brother-in-law had no issue communicating with her as he posed questions.
I would like to add the Efi suggested reordering our stops to avoid the big bus loads from the two cruise ships in port. This was a VERY good suggestion. We left sites just as the buses were arriving.
Efi also 'controlled' the weather so that we avoided the downpours experienced by some of fellow cruise passengers as we learned upon reboarding our ship in the afternoon.

I wanted to write to you to tell you that we had a wonderful visit in Cherbourg and that our guide was fantastic. I would recommend him to anyone and appreciated your work with connecting us for a tour.

Andreas was very polite, informative, helpful, prompt