I have a Seasucker and it works well.
If your car isn't designed to accommodate a hitch from the factory, I'd proceed with caution on getting one installed. Just because someone makes a kit or says they can do it doesn't mean it's a good idea. I'm sure on some cars it's no big deal, but I looked into this for my current car, and was told by a local shop that they would need to cut into the bumper and custom weld brackets to the frame. It was a pretty big job. My auto engineer friends also told me that hitch installations like this on cars not designed for them can compromise the rear impact/crumple zones and also warned that driver aid sensors/cameras/etc need to be re-calibrated to factory spec after removing the bumper. This is not a job I want a summer employee at the local moving truck rental place to be doing on my new car.