The two stars is primarily due to the general customer service support number. At no point did it give me the ability to talk to a customer support representative. Every point it said something to the effect of please go the website, however the website did not have the answers I needed.
However, I am hopeful with the Airport location. I was able to get though to them, and they were able to clarify questions I had. Which is the only reason I am giving Sixt a 3 star rating. They brought it up from 1.
When I call customer support I don't want to get an automated system that the only end result is to "go to the website". Especially when that is where I spent time this morning looking for the answers for the questions I had.
Honestly seems like this is just another company that reduces the number of employees to save a buck, regardless of how negatively it impacts the customer.