I thought a few of the F13 flicks were cool, while others were not. Jason X? I don't know . . . at least it's a different avenue (cyber-Jason?) but what about the next sequel? Ooops, I forgot that continuity doesn't apply there.
As for "I Will Never Ever Forget What You Did Last Summer and the Summer Before" - let me just say to LTBasker that if you didn't like the first one, you REALLY wouldn't like the second one.
The only thing part 2 had going for it was Jack Black, IMO.