Thank you for your reply!
Well, I'm an Italian guy, 24 yo and I did my bachelor in Italy, a good University but small and not international. Now I'm in The Netherlands (TUDelft) and I'm doing an intern in an American Company focused in the oil&gas. I am currently more interested in an European B school, mainly HEC and INSEAD.
I would like to do the summer school for several reasons, for finishing this period of my life with a small experience in a business school, getting some knowledge in something that I never studied before and meet interesting people. Then, I hope this summer school could, at least, help me getting some things clear in my head and kickstart my resume for my first full time job as engineer in the energy sector (do you think could it really help me on this?) and maybe also a very very small advantage for the applications for the MBA in the future.
I really appreciate all your opinions, I just started looked into it and every opinion is useful for me