Well, it is certainly a great deal more inexpensive than the Whizlabs package, but it also offers a great deal less of options.
I can talk in favor of Whizlabs because I bought it when I was studying for the exam. I will tell you what you can get with Whizlabs, maybe that can help you decide.
My version of Whizlabs Exam Simulator for the SCJP 1.4 contains:
10 different mock exams
About 800 different questions in three differente levels (begginer, intermediate, and expert) with a great coverage of all exam objectives.
1 autoevaluation exam
1 real simulation exam
Customizable exams, so that you can choose the objectives covered by the questions and the level of the questions you will have to respond
A world class interface that simulates very well the real exam interface
Excelente explanations of the real answers for the questions you fail.
Historical data of your performace
Graphical charts for you to evalute your performace in the different objectives for the exam
A great Support team, they have attended all my requests, they have asked for my feedback to improve their exams and they have offered me promotions from time to time.
Finally, they give you a demo version of their product before buying it, so that you can evaluate what they offer to you.
Well, what can I say, I am really satisfied with this people, and I really recommend their product.
Just try to determine how much of all these you will get from these other guys, and determine if it is a fair price. But if you have the money for a Whizlabs, well I just can tell you you will not regret the money you spend on it. It was worth every cent I paid for it.
Good luck and success with your exam, pal. [ January 15, 2006: Message edited by: Edwin Dalorzo ]