This manga's amazing. I was expecting your typical lucky pervert protag hentai/cheese cake manga... but it isn't that at all. Yes there's lots of boobs and butt, BUT that's just window dressing. What this manga actually strives toward is an introspective and philosophical piece asking non-stop questions about self-improvement and achieving ones fitness and life goals, or even just realizing them. Maybe saying that manga is amazing is a stretch, but it did surprise me. Still, thoughts like those that are in this story are a gateway to change or inspiration for people, and at the end of the day stories that achieve such things have a lot more staying power.
If the main girl's presentation and design weren't quite so over the top from the get go, I would absolutely recommend this manga. As is, it might be a little bit too erotic at first glance for anyone but seasoned manga readers.