Living in France is a bit different to being in the UK. As mentioned above, Thomann use UPS here and I've never had a problem with them.
I did return a faulty guitar a month or two ago and I had to use the French postal service. It got lost and Thomann made me wait a week or so in case it turned up (fair enough I thought) and then sent out a replacement.
I've always found their customer service to be first class and buy quite a lot of gear from them. When I'm in the UK (rarely) I tend to use Andertons, who are equally good.
If Andertons have the item you want, I'd have no hesitation in recommending them