You can review the data that your recepients submitted via FormsCentral / View Responses tab. Open the form and click on the View Responses tab, there you will see the responses table. Also, here you can select a response and Save As PDF button in toolbar, and you will be able to see the PDF form with a particular response record.
You can also enable email notification via the Options tab, so that you receive emails when your recepients fill out and submit the form.
If you are asking about how to review the data that the form filler filled in without submitting them yet, as if you would do it in a approval-workflow, then, you cannot do this in FormsCentral. You may want to check out other Adobe products, such as Adobe Acrobat or Livecycle Designer.