I've been using Open Table for several years now. I make reservations often - maybe once a month - and have never had a single problem. It's very easy to use - with a few clicks on the site (or app) I can make a reservation. I also don't receive constant e-mails - just reminders about the reservation a day or so beforehand. PLUS...you get points every time you make (and keep) a reservation. Bonus!
