I'm sorry, but I just don't understand all these "good price" comments.
For €30, you only get extra races on existing tracks, with cars you already own, and you can't even tune them for the races, apparently not even customize them, similar to split-screen mode.
Yes, you get six cars, but you already own them or can buy them. They just look slightly different.
It's not worth the money. I'd rather wait until the DLC is on sale.
Oh yeah, I almost forgot. GT7 is available for €45 on Amazon, without any discounts. The DLC costs €30.
You're paying 66.6% of the current full price for GT7 for the DLC and only getting about 20%, or less, of the content.