I haven't bought F5, so I suppose my opinion doesn't matter too much, but I know that it's packed with tons of material that is probably excellent. Those testimonials of people multiplying the size of their businesses are truly amazing.
The problem I have with that is that it doesn't help those who don't have a business to multiply, or those who have little to no knowledge of Internet Marketing. If a newbie bought F5, more than likely it would serve to not only put him/her out of $2500, but it would cause epic information overload.
I used to want everything that came out, but now I realize that I have to focus on something that works and stick with it. Even when I see new products coming out that make me drool, I usually don't buy them anymore because I know it'll only serve to clog my brain and my hard drive.