I studied at the University College London (UCL) for one semester. The semester was arguably one of the best times of my life. I learned a lot about other cultures, my culture, a different education system and the world at large. I was privileged to travel to about 7 countries throughout my time abroad and each experience was unique and enriching.
UCL is an academically rigorous school just like my homeschool Rice but it was interesting to see how the different the rigor was because of the different systems.
I would recommend studying abroad 100% to anyone.