Absolutely. I love the Schaum's series. When I took mathematical stats, the text we used was so bad, we switched over to the Schaum's book. Most math professor I talk to all say they used the old school Schaum's books along the way. So yeah, good investments for problems, a bit short on theory.
As for the calculus one, never used it, my text had enough problems & for theory I used The Calculus Lifesaver. As for college physics, again my text had plenty of problems but I also used the Schaum's book now & then. The problem was however that this particular text had a good many typos & some of the answers were clearly wrong as well. As a supplement, I used the textbook study guides (University Physics series) which had more problems.