Jim its just I dont understand the point of your question. You seem to insinuate that because Fred is going to Germany that perhaps the testimonials posted here and elsewhere many are fake? And yet in the same breath you say that 3 of the 4 people you have recommended have come back with positive reviews.
Perhaps I am missing something.
And yes, it is difficult to fully validate a testimonial good or bad so Im not sure what type of answer you are expecting. Why not trust in your friends and your own experience.