I don't know who Mr Filbert is, but his olives were decent. Not sure they lived up to the claim of being "really interesting snacks".
Although they were apparently marinated in lemon and oregano, they mainly tasted of olives and a bit of salt. Unlike other packets of olives I've had they weren't oily, which was nice. The olives were firm, not slimy, and tasted reasonably fresh considering they came in a foiled packet.