In fact, the secretary ENAC -TOPO of my labs (EPFL) informed me that TradiConsult is a very bad company in Lausanne with many problems with students and she don't recommend this company. And she said also that I must choose a Swiss mandatory health company with SFr 2500 excess... But the problem is not changed. I paid to much insurance in this way. Friends of me recommend the company Swisscare and t'ill i'm there, until now, i had no major problems with this company. The website is http://www.swisscare.ch.
I think the best way is to choose a company which is cheap and recognized.

See you