It is actually hard to believe that the free version offers so much value.
From the research I've made, most other booking apps out there will charge you on a per booking basis and offer similar or more limited features.
Guestonline doesn't charge anything, there is no catch (at least I haven't seen any). They do offer a premium subscription, but the free version has enough features to be more than useful.
If you have a restaurant and you want to take online reservations, this is probably the best choice.
IMO this plugins deserves some recognition and another five star review. So here is mine. Thanks guys.