Is it secure enough (https) that users can fill in their Credit Card (CC) details which is then securely stored?
You can get more information about our security here : http://forums.adobe.com/docs/DOC-1384
The information is store securely on our server but we don't recommend asking for CC information or at least don't include the Form Data if you turn on Email Receipt or Email Notifications. I would suggest that you take advantage of the PayPal integration so that you don't have to track CC information (PayPal Integration info : http://forums.adobe.com/docs/DOC-1632)
When we retrieve the data, is it in the form of the published form so that when it gets printed, it looks like the form that was filled out?
Yes, you can Download the response as a PDF Form which would look like the form.
In addition, is the data also available in a database format (row and columns) and can it be downloaded, rows deleted etc.?
Yes, you will see the data under the View Responses Table. The data can be exported as excel, csv or pdf format.
Who has access to the submitted data?
The form author or any person the author explicitly shares the form with.
Once a user hits Submit, can they open the form again and see what they entered?
Not if you create a HTML (web) form. You have the option to distribute a PDF form and in that case the user can save the form on their system with the data.
Once they submit a form, can it be set to send them a copy via email as well as to a pre-determined email address to alert me that a form was submitted?
We support email receipt (sent to the person that filled the form) and email notifications (can be sent to the forms author and/or to anyone who has access to the form as a co-author, controbutor or reader)
If you ask for the same information on two places in a form (like an address), can it be set up so that the second instance is automatically completed based in the first instance?
No we do not support this feature
Note that you can either add the link of your form to your website or actually embed your web form to your website. Again I would actually suggest to use our PayPal integration to collect payments.
Hope this helps. You can find more information about FormsCentral here :
Video overview of FormsCentral: https://www.acrobat.com/formscentral/en/video-index/formscentral-overv iew.html
A collection of quick start guides and tutorials: https://www.acrobat.com/formscentral/en/library/how-to-make-create-sur vey-or-form.html