Within American culture, naps is largely viewed upon negatively as a sign of laziness or lack of motivation. Sure, for kids, naps are seen as a good thing. But, once you reach a certain age, naps are seen as a bad habit.
However, I see naps as really beneficial to increasing productivity. Studies have shown that creativity and intelligence rise drastically with a regular sleep schedule of about 8 hours a night. As long as nap for about 30 minutes, you should see an increase in creativity and intelligence. If you nap for over 30 minutes though, you are likely to become drowsy and lethargic. Breaks are overall a good thing because they allow you to recargar tus pilas (recharge your batteries).