Question about Brabantia Sort & Go

No, not at all. The bag is too small, so you can't put it over completely, only halfway, and it's annoying ;)

I use the Brabantia for 17-litre bags. But that only works if I pull the waste bag out a bit at the top so that the plastic expands.

Unfortunately, 17 litre bin liners don't fit. I use Brabantia 16-litre bags. They fit perfectly into the 17-litre bin liners. Not so environmentally friendly, perhaps, but a clean thing to do. And in the end you save on bin liners because you can compress the waste better.