Appointments + default e-mails aren't descriptive nor helpful.

Customize E-mail Notifications from Appointments +

WPMU DEV’s Appointments + is a great scheduling plugin for WordPress. Though this plugin is not specifically intended for booking…

WPMU DEV’s Appointments + is a great scheduling plugin for WordPress. Though this plugin is not specifically intended for booking reservations (WPMU DEV is developing a plugin specific for booking), this does just fine with a few customizations.