I did a short-term summer internship in France and found out that I needed "civil liability…read moreinsurance." I found this company through tripadvisor, and since it seemed to be the only one that would offer short-term insurance, I signed up- a quick online process.
I bought the insurance only because I had to, but then I ended up getting sick and needing a doctor. I paid all my costs up front and wasn't holding my breath for reimbursement, but I just received the check and after my 30eur deductible, everything was covered! Their customer service was great. I mailed in my forms and then was contacted by email- apparently I was missing a form from the lab. Their representative actually contacted the lab for me (I was having communication issues), and resolved the problem on her own! I wasn't expecting much but was really impressed.
P.S. Though Yelp only lists the building, you don't have to do anything in person- just google the company name.