After suffering a traumatic brain injury (TBI) in Iraq, I have been experiencing memory retention issues and have difficulty with concentrating. My Speech Therapist recommended the Perplexors series. I tried one in her office and was instantly hooked.
Not only is it fun, rewarding, and challenging but it has given me confidence in myself to try taking a college course. And I have noticed that I am better at remembering details and quicker at solving problems. Worth every penny.
SIDE NOTE: I allowed a fellow Soldier to try one and he, too, is now hooked and loves to do them.