It annoys me when restaurants provide an online form for reservations, put in their disclaimer that "no reservation = no table", but when you make the reservation things go wrong.
For starters: their infrastructure not working on weekends (while they are open on weekends), them doing manual instead of automatic validation of a reservation, them not even knowing how to manage their own reservation system (which gives me the idea that they purchased some random reservation software).

I ended end having to call them about my reservation, they had a confused voice at the phone while they were navigating their own reservation software and ended up saying "Yeah ok table is booked, bye". I understand they're stressed out but come on, I don't think this is a modern nor graceful process. If you're boasting about having a reservation form, then at least live up to it. It reminds me of another restaurant where I had made a reservation online and when I got there, they told me "Next time book by phone please, we're not used to our software". For *********** sake.

Bah.