I've been using Jomres for about a year now. And the thing I love about it is, that it's very flexible. I use it for Yacht Charter, Accomodations ( apartments, hotels, villas etc.. ), Sailing School and much more. Basically you can use it for pretty much everything. And it's also very user friendly, either if your a customer or a manager, you shouldn't have any problems at all.
And above all that, theres a great support team behind the project which wont let you down if you happen to run into a problem, or maybe mess something up ;p
Anyway, if your looking for a reservation system of any kind, I would highly recommend Jomres !