Hi Philip,
Thank you for your inquire.

1.

I can send you some of our users that are using our plugin 

https://bombshellesthetics.ca/

https://bookaclean.com.au/

https://cryolife.cz/

https://bghitnemchilcanada.com/

https://singingwizard.uk/booking/

2.

Yes, our plugin is using shrotcodes to display on the page

Here’s the list of all our shortcodes:

1. For Step-by-Step Booking Wizard view:
   1. [ameliabooking] if you want to show the basic Step-by-step Booking wizard,
   2. [ameliabooking category=1] if you want to show only the services from a category with ID 1,
   3. [ameliabooking service=1] if you want to show the booking form for the service with ID 1.
   4. [ameliabooking employee=1] if you want to show the booking form for the employee with ID 1,
   5. [ameliabooking location=1] if you want to show the booking form for the location with ID 1,
   6. [ameliabooking category=1 employee=1] if you want to show only the services from a category with ID 1 that are assigned to the employee with ID 1,
   7. [ameliabooking category=1 location=1] if you want to show only the services from a category with ID 1 that are provided on the location with ID 1,
2. For the Service Catalog view:
   1. [ameliacatalog] if you want to show the basic Service Catalog view,
   2. [ameliacatalog category=1] if you want to show only the services from a category with ID 1,
   3. [ameliacatalog service=1] if you want to show this form for the service with ID 1,
   4. [ameliacatalog employee=1] if you want to show the services of one specific employee with ID 1,
   5. [ameliacatalog location=1] if you want to show the services of one specific location with ID 1,
   6. [ameliacatalog category=1 employee=1] if you want to show only the services from a category with ID 1 that are assigned to the employee with ID 1,
   7. [ameliacatalog category=1 location=1] if you want to show only the services from a category with ID 1 that are provided on the location with ID 1,
3. For the Search view:
   1. [ameliasearch] if you want to show the basic search view,
   2. [ameliasearch today=1] if you want to show the search view with a preselected current date.
4. For the Event booking:
   1. [ameliaevents] if you want to show list of all your events,
   2. [ameliaevents tag=’name’] if you want to show just the events that belongs to the same tag defined during the creation of events, where “name” will be replaced with the tag name,
   3. [ameliaevents event=1] if you want to show only the event with ID 1 without its recurring events,
   4. [ameliaevents event=1 recurring=1] if you want to show the event with ID 1 with all his recurring events.
5. Amelia Front-end Customer Panel
   1. [ameliacustomerpanel appointments=1 events=1] if you want to show both Appointments and Events,
   2. [ameliacustomerpanel events=1] if you want to show only Events,
   3. [ameliacustomerpanel appointments=1] if you want to show only Appointments in the Customer Panel.

3 and 4.

You can customize the email notifications to your desire, and also choose on which action they will be sent.

More information on this link

5.

We do not have some special requirements for the server, but if you want to test it out you can download our free version of our plugin from this link. Also as we do not have a trial version, we do have 15 days money back guarantee if you purchase the plugin to test it out.

6.

With the PRO plans, the 3 domains are available to have the plugin activate. The license is connected with the domain not the email that is used to connect to google calendar.

On 1 domain you can have multiple employees and all of them can be connected to their own Google calendar.

7.

At the moment we do not have some kind of security to disable spam, but you can use for example some other plugin to allow only logged in users or users that have some kind of membership for your site to access the pages where our plugin is.

Best regards.