Just wrapping up a trip to San Juan. The resources on the Chabad website are great. The shnitzel sub was amazing and the perfect level of crisp. My wife loved the mushroom barley soup and shnitzel with rice (big portion!). Minyanim had 13-18 people each time. Got a great rate on the Fairmont using the Chabad link, and it's only a 7-8 movie walk away.
Also used the tour guide on his website (Marcelle), she's originally from New York, but sometimes acts Israeli with some of the personal questions
.... But she definitely knows her way around the island and gave us a tour of the rain forest, though it was unusually cloudy and wet day, so visibility was limited. Still very cool and good for non-active people like us.