Rating: 3 stars

The Good:
I like the approach of setting hours groups. The basic functionality works well.

The Bad:
Several PHP notices appear when define('WP_DEBUG', true); is set. Please clean this up.

Add the feature to specify Closed on certain days.

Please remove the default leading zeros on the hours, so that the auto-complete returns 9:00 PM instead of 09:00 PM.

Thanks and keep up the good work.