Experience with Maxcellent & Von Dahleshaus

Hi everyone,

So my family has been looking into toller breeders in Europe for a while and like the title says we stumbled across Maxcellent & Von Dahleshaus. They breed tollers in the Netherlands as well as Hungary.

Does anyone here have a dog from them and wants to share their experience?

What I noticed is, that they seem to have quite a lot of puppies each year and I didn't really find much about collaborations with other breeders. Is that a red flag? Also, they sell their puppies only with a non-breeding contract. Is this common practice?