I did the computer one &  I think it's supposed to be slightly less painful, (verus using the pencil and dots thing), and you get your score upfront or can cancel it if you don't think you did well.
Be sure to at least look over a paper book / or prep disc to familiarize yourself with at least the format of the exam. Since often times you will run out of time, it is vital to be able to pace yourself and know when to guess and move on. My last score was messed up because I wasn't able to finish those lame questions where it asks you lame logical kinds of puzzle things. 
(1) Fred is sitting between George and ALfred
(2) Fred wears black
(3) There can only be 10,000 people on the committee
(4) Random people on the commitee will disappear at random
How many people are on the commitee, what are their names and favorite colors?
If Fred wore white where is George sitting?
Is it possible for ALfredo to eat spaghetti?