My time studying abroad with ISA in Costa Rica is still one of the highlights of my life, and it's been over five years since I was there. The ISA team was very helpful leading up to my departure, upon arrival, and throughout the three months of the program. I always felt cared for, and enjoyed interacting with the fun, on-site staff members. There were so many great people in my program, too! I've been lucky enough to stay in touch with my best friends from the program, and we've traveled all over the USA to visit each other.
Costa Rica is a fantastic country for people who want to practice Spanish, since Costa Ricans speak a very "clean," easy to understand version of the language. The only downside of studying in San Jose, rather than some of ISA's other options in Costa Rica, is that many locals speak English - and there are plenty of English-speaking students as well. It's not as immersive of an experience as a smaller town would be. Apart from that, Costa Rica is incredibly beautiful, full of outdoor activities, and easy to travel around. I'd recommend this experience to anyone!