Had a really pleasant stay here this June! The apartment had a nice and clean interior, the staff was very friendly and spoke English. We were even welcomed with a complimentary bottle of wine :) The apartment had a fully equipped kitchen (dishwasher, coffee machine, fridge, stove top, microwave oven). For people checking in / out, there is a shower and lockers for your luggage downstairs, very convenient if you arrive before check in or are leaving after check out time. There is also a washing machine downstairs.
The location was perfect - no large crowds around (at least at the time we were there) and within walking distance of many restaurants/bars, as well as city beach, the main boardwalk, and shops including grocery. On the topic of food, there is a great deli right next door where you can find a large assortment of meats, cured fish, and cheeses! If you visit at the end of June, during the San Juan celebrations, you’ll see the area come alive at night with people and parties.