Avent ventilation device AP Pluggit

Hello everyone,
I have an offer from the developer (Heinz von Heiden) for my planned house (Arcus 160 - 152.57 sqm (according to WoFIV) and 164.79 (according to DIN 277): Avent ventilation unit AP PLUGGIT.
- What are your opinions about the living area and the unit?
- What has been your experience with the unit so far?
THANK YOU for your response.

Quite a bit has already been written about Pluggit, just use the search. Opinions vary.