¡Aproveche!

If I could go back in time, I would. My expericence was priceless. My host family was beyond wonderful. My host sister would always wake up with a smile and say,"Hola, Jay!" The teaching staff were bright and sunny when you'd return a "saludo" in passing. Yes, classes from 8 am to 12pm for five days a week was a bit tiresome, but worth every minute of my time and effort.
I love, love, love to travel so Costa Rica serves as an ideal location to do that. Transportation is reasonable. I would recommend a Central American trip, I did that, and I had a fabulous time.
Take advantage while you can. Go with CIS or with anyone, to Costa Rica because you will have an amazing experience.