To begin with, let me state that I have not either downloaded or used this product. However I have been acquainted with similar products and have browsed the web site.
SQL databases are not for novices. Generally, if you are looking for something for your music, video collection, wine list, or exercise routine, this is not what you want to use. While it is "free" the company makes its money off of support, consulting, training, and certification. It is designed to be run off of servers and support many users for powerful relational databases. It was not designed with the casual or home user in mind, except as a user logging into a running database over a network. On the other hand, this might be a place to start if you want to learn about becoming a database engineer or designer.
While I am always looking for a good deal or something free, this may not be it for the average user when it comes to databases. Frankly I can't think of a free simple, easy to use general purpose database offhand. For a quick solution with limited records, I use AppleWorks - yes it is still available, works in Panther, has a real flat file database, and is relatively inexpensive. Otherwise I use FileMaker. While I believe it is somewhat overpriced for an individual user, it is stable, fairly easy to use and does the job well. FileMaker now has relational database capabilities and can be easily be published on the web.
If you don't know what a relational database is, you probably don't need one and can get by with a traditional flat file database. Trust me, they are easier to setup, deal with, understand and maintain.
Please note: Excel is NOT a database, it is a spreadsheet, although it can be made to look like a database. No spreadsheet I know of is a true database. On the other hand, databases can be made to look like spreadsheets as well.