My younger sister LOVES these things, so I'm familiar with them.
Toys R Us is often sold out of them. We've had the best luck finding them at Target. The Bratz limo was at Target before it was officially released in stores.
The Bratz are "the girls with a passion for fashion". While their makeup is a bit exaggerated (might say trashy), the dolls are almost like chararictures. Big heads, small body, waist, long legs, huge feet.
They are cute. They come with these detailed outfits and SO many accessories. While their names are "The Bratz", the only message that the dolls send is to go shopping, lol. The outfits are very cute and in tune with the current styles.
They even have Bratz Boys, who are equally detailed! Personally, I think they're adoreable.