I own Lethal, and I'd have to say, it is a great DVD. The flourishes are nice, they're not particularly hard (providing you put the practice in) and you can easily adapt them to suit you.
However, the thing that annoyed me was that everything's in black and white and sometimes it can be hard to see what D+M's doing (especially if you're looking for specifics like finger placement).
Now, I don't own the Trilogy, but in my opinion, I'd get that. It's ridiculous paying $100+ for one flourishing DVD when you can get 3 DVDs full of tricks, flourishes and everything else (
) for even less. Anyway, Dangerous is being released soon with Lethal footage on, and if you buy the Trilogy, you'll have some money left over from the $100 to purchase Dangerous with.
If you have any more questions, feel free to PM me.
=]
~The Emogician~