Protector Trials are cool because they force you to play with specific weapon/plasmid combos. I don't know about you, but once I found weapons/plasmids that I liked, I never really strayed too far from them.
There's supposed to be a 2k sale starting tomorrow, and BS2 is supposed to have some content on sale... so maybe the Protector Trials will be on sale. I think I got them for 200 pts last time they were on sale. For that you can't go wrong. But they are no Minerva's Den. :(