ZipCar vs Colorado Car Share (in Boulder)

[Aardvark]

I am based in Boulder and want to join a car share org. This is almost exclusively for Weekend getaways, but let's include a trip or two each month to Golden/Denver.

From what I can see (living close to Eben G Fine Park) Colorado Car share has a car located MUCH closer to me. Their prices also seem to be a bit better than ZipCar.
https://carshare.org/vehicles-locations/
https://www.zipcar.com/?zipmarket=130

Is there anything else that I should be considering here?

Any insights would be great.

[Aardvark]

I just came across Turo which seems to be another worthy option to consider.