I used Mad4Joomla about 1,5 years as I came to the point I needed more special functions like database support with export, custom emails and so on. I updated Mailforms to 1.2 and recognized that the pro version Proforms does everything I need. I must say this is a very very profressional solution. Especially the database functions are very easy to use and versatile. You can export the data with one click in the format you need (XLS, CSV with commas and CSV with semicolon). No thinking - just push the button.
This extension is worth every penny.