I had a very easy and fast pick-up. I was given a free upgrade even though I do not rent cars often. The staff were professional and helpful. The price, through Expedia, was very fair.
Biard is a very small airport and the Sixt desk is only open when flights are arriving. At the end of the rental I left the car in the car park and the keys in the key box on the rental desk. When I turned on my phone after my plane landed there was an email confirming the good condition of the vehicle.