dacoman wrote a review of Thule Revolver Hitch Bike Carrier with Retractable Locking Cable - 4 Bike on July 8, 2010
It gets three stars because fitting 4 bikes is more of a wish then reality. Maybe it will fit 4 street bikes but not 4 mountain bikes. I had 2 adult MB one kid (24" wheel) and a tag along, and I had to turn the handle bars (90degree) on all of the bikes and take the seats off three of the bikes. I see no way of fitting 4 adult MB without fiddling with the handle bars and/or seat.