FileChucker is a great drop-in solution for file uploads, and worth every penny of its very reasonable cost. Encodable's support is excellent to boot.
I just installed the demo of your product and got it up and running in no time. I searched high and low for a decent login script and thank God I found yours.
The amount of customization in the program is incredible. I was able to integrate it into my existing page layout relatively simply. I was also able to easily customize the look/feel to match the current site.