I had some great experience with Simos and Motor Inn. Both bikes (Transalp and XT660) and the scooter (Aprilia Scarabei) were in top-notch condition. Conditions were flexible and we managed to shift our booking due to our delayed arrival caused by seamen strike in Athens. Simos also provided an invaluable insight on what to see and which routes to take and which to avoid on Santorini. Would definitely recommend to a friend.