I have crack.
I use it for PAT and RC( good especially the RC)
But the other tests are kinda hard. Yesterday I took a test on general chem and so many stuff they didn't cover it with chad or Mike.
So I was upset, but regardless, I looked at the questions and took notes.
I mean if you have the time and money. Why not!
But I would suggest also datqvault for bio.
Also, your main focus should be Dat Bootcamp and reviewing the materials, and consider purchasing dat destroyer.