Yes my cylinder isn't compatible, it won't allow inserting a key from the other side. But I saw they sell a replacement one for 100 euro

Not being internet connected isn't the end of the world, but that hidden expensive in-app purchase is really scammy because you would only notice that after you bought the device, after installation and probably even after the return window. All YouTube reviewers got the pro model, which doesn't have this artificial limitation. If I didn't watch that video, I would noticed that after years (I don't have enough matter/thread devices to justify the purchase of a hub yet)

And also the door opening sensor isn't included in the box but of course YouTube reviewers are showing it as part of the kit because they got all included. And the product page doesn't specify that explicitly.

Searched the user manual in PDF to learn more about the product, it's 4 sentences that explain absolutely nothing

So in the end I wanted the base model over the pro because for me having 4 AAs instead of a "proprietary" battery pack (4 AAs in a custom plastic shell) is much better and giving direct full internet access to the door lock via WiFi is too scary... but between the missing opening sensor, the IAP, the build quality, I think I will choose another one