i go on all of them constantly... either to do comparos, or just professional curiosity....
or to pretend it's comparos and professional curiosity.
i even go on my own brands, even though i have all the code books and software to build it directly... i like to see what the customer will see.
i don't like any of the ones with small print/boxes to check for taxes, including freight, etc... also not a real fan of all the accessories you can add on... just complicates things... just keep it to factory options and packages.
all have been ok... expect bmw... as others have said, sucks. i have to attempt with different browsers and i usually just give up...