We landed in Moscow for one night connection and we only had a few hours in the evening to tour the city.
A Google search prior to our trip, resulted in a few guides for a night tour of Moscow, and I contacted them all by email. Arthur was the most responsive and communicative, and gave the best impression by far, so we payed the deposit by Paypal and waited for the day.
Arthur met us at the hotel at 20:00 as agreed (90 minutes after landing) and took us to a great tour of the city, explaining both what we see all the time, as well as the history of Moscow and Russia. Arthur also took nice photos of us with his professional Nikon camera, and two days later sent them to us via Dropbox.
I would recommend using Arthur's services with no hesitations! Excellent English, Good clean car, polite and knowledgable.
Next time I'll be visiting Moscow (hopefully during day-time, no doubt I'll use Arthur's services again.