If you know the car you want and are happy to pay for it, under most PCP schemes there is no downside. (I say most because I don't know which one you are looking at, but generally they do not over charge for credit, some even give free credit).
So is it too good to be true ?
Well, yes and no.
The reason car companies offer these schemes is not to make money directly from the schemes, it is to make it easier to buy a more expensive car.
If you have €10k to spend, a pep scheme might induce you to sign up for a €15k car. Thats why they do it.
If you have the discipline to only spend the €10k then you are really getting a free lunch, the car company makes its extra from the average buyer who is tempted into the bigger car by the ease of PCP finance.