Yes it is, I've been in contact with them direct numerous times. The company has been operating land based tours since 1995 and have just started offering cruise ship tours. They've got 4 guides and cars and can accommodate 41 passengers across their vehicles. They also have access to a larger bus for groups up to 40.
At present they are in the process of finalising their website where you can book direct for a cheaper price. It should be up and running by the end of the month. They require a deposit of 50 euro, and you can pay the deposit on the day by cash or credit card.
I've got 1 couple joining us and are getting the full day tour for 230 euro each. Still looking for another couple or two which can drop the price to 225, then 220 pp. At present you can book on TA, Get you Guide etc, but it's dearer.
I was very wary considering the lack of reviews, but they told me they're new to shore excursions and the couple of tours that the guide Adriana gave had excellent reviews, so we're going with them. Anything's better than the overinflated ships tours which are in USD, so add 50% for Australians. A similiar ships tours would cost us $524 AUD PP for a 5 hour tour with no lunch!