I bought this as a recreational runner who's had one bout of plantar fasciitis and ongoing ankle / achilles issues, after reading some of the books recommended by TFC and going on a bit of a learning journey. It's become a part of my mobility / exercise / strength training - and a fun one! I keep the foot roller in my office, to use when I'm on client calls and the balance beam's in the living room to remind me to play a bit every day... I even took it on a weekend away recently, as it's really easy to pack up.
Already feeling better for it - my feet are looser and more flexible, and my ankle range is increasing, along with my balance! Highly recommend : )