The aero kit is the spoiler, the front splitter and the side skirts. They are expensive add ons so they are quite uncommon in general. They do look good though!
To live with, it depends what you mainly use your car for. I use mine as a daily and it's great, it does the job very well. The ride can be a little stiff (depending what you're used to), fuel economy isn't the best and like many cars, they have their niggles and common problems.
But as Pav says, once you are out on the right roads and you can give it the beans, you will love it and get instant smiles!! Fantastic little cars.