Well, the buses don't come too often in PR, but they are reliable for the most part and will come eventually. I took the bus into San Juan a couple times from Isla Verde and neither time the driver asked for fare, just told me it was "gratis ahora".
The worst part is probably just sitting in that crap little area in San Juan waiting to get the bus back as there's no real time table you just wait and hope the driver comes out eventually.
I loved listening and trying to learn more spanish from the locals riding with me. It's also a great way to see various neighborhoods including residential ones tourists really don't get to much.
Ironically enough the only person that got a bit upset with my crap spanish was an older lady that I asked about when the next bus was. She exlaimed to her friend "tourista!" and I go "claro, soy turista, cuando piensa el proxima bus!". She told me, but was shaking her head. Oh well, grumpy old lady aside the trips were fine. read more