The program offers a list-interface, which means if the words aren't on the list or you don't input new vocabulary regularly, the ability to learn from BYKI Deluxe Latin is rather limited. On the plus side, however, the ability to enter your own words into the program for custom lists is a great one for students who are supplementing their classroom learning with this program. Also, this program does not cover grammar, only vocabulary. In this way, it is rather limited. If you are looking to build your vocabulary, however, this program will be perfect for you.
The program does deliver on its promise of addiction - sort of. The program is enjoyable to use for a time, but not nearly as much as some of the other language learning programs available (I'm thinking here of Rosetta Stone and even Livemocha.) The program also features a chart to monitor progress through the program. This is a useful feature for teachers using it in their classroom and parents wishing to utilize the program with their children.