We tried Supersaas, Booking bug and Webervations as well as an open source one for Joomla (Joomrez or something like that) before Checkfront.
Checkfront has a pretty slick UI and integrates well into our website. The others were so so, with Webervations being the worst.
What one works best for you will probably depend on what you business needs are. You may just want sit down for an hour and try them all, and take your pick. For us, that was Checkfront.
