The complete package only costs a few $$ more, but it's well worth it - the price is right and the support on their site seems great. Not that it's needed since all the set up options are extremely easy to find or are intuitive and if you're stumped just search through their forum. I highly recommend this to anyone looking for better contact (ENHANCED) contact forms over the default Joomla forms.
JCH-Optimize is an app people normally would pay huge sums of money for, and even if it does end up commercial some day, I would still rank this in the top of required apps to have!
Get it today!