I know I'm late, but yeah, I'd still get them. I thought they really helped me nail down my understanding of the various topics. Through using the physics especially, I found that I didn't understand some things as well as I would like. Furthermore, for whatever reason, they helped me visual the problem in the head and made the equations intuitive to use. Plus, doing more timed practice problems is always a good thing.
The only negative for the non-bio and VR practice books is, as pointed out already, they aren't in the right format (unless you think of them as tons of discretes). Nevertheless, they were very helpful for the above reasons. Lastly, this problem would be alleviated by the other practice material. There are also the practice tests as well.
To sum up, yes, they're helpful; however, they should act as supplements to your other practice material. If you're strapped for cash, get the TPR Hyperlearning Science Workbook, EK Bio 1001, and EK Verbal 101.