I think you will find that our extension are very helpful and should speed up the process of development, in addition, most of the extension will save you time in testing, but our server behaviors will do additional checking and prevent certain things that are helpful for your site.
I would just recommend that you run the wizard on a test page to get a feeling for it and then use it on your site.
in regard to eCart 5, i think the wizard is well presented and the documentation (clicking the help button) should cover any confusions about any of the settings. You can also look at the support page with eCart to look over some tutorials and if you have any question, please let me know and we will try to assist you.
