We just returned from a 10 day stay at natz ti ha
Natz Ti ha - map
Easy walk to Mamitas and Kool. You can walk along the beach or down 5th.
Also a very nice stroll down further south on 5th in the evenings for dinner/shopping, etc.
We only took a cab home once from Fusion after dinner as the kids were falling asleep. (another huge thumbs up for Fusion - lunch on the beach, dinner in the restaurant, live music, cool bar. You name it, great place. Our favorite waiter was Luis).
Other than that, we walked everywhere. Excellent location. Enjoy!!