I spent a month in Jaco in Jan/Feb this year. I found it to be a nice middle ground where it's on the beach, but is also a (small) city with reliable internet. It's easy to get to Santa Teresa/San Jose/Manuel Antononio, etc as well.
It has a (not-entirely-undeserved) rep as being seedy/a party town, but I found the overall pros to outweigh cons related to that.
It has a (not-entirely-undeserved) rep as being seedy/a party town, but I found the overall pros to outweigh cons related to that.