If most cars on the road are taxis, this means a few things. 1) It'll be much cheaper than owning a car. 2) There will always be a car within a minute or two to pick you up when you're ready. 3) There will be cars of every configuration available, including ones with car seats for kids (although it's not a huge deal, my twin's car seats take less than a minute to install). 4) These cars will be checked daily, and if you do happen to get a dirty car, you can just report it and get another one in the next few minutes. They'll likely have cameras in the cars that will know if someones smoking or having sex in there, so not many folks will do it if they don't want to pay a huge fee or get banned from the service.