I have only tried the sandwich biscuits from this brand, but all three flavors I've tried have been good. My favorite of the three is the dark chocolate flavor. I like that these products only contain good ingredients as well as having a little bit of protein in them.
A lot of the marketing behind Olyra speaks to their Greek origin, from the package design (featuring Pegasus, Poseidon, etc.) to, at least on the strawberry fruit-filled biscuits I tried, the "Sustained Energy from Ancient Greek Grains" tagline (those grains appear to be spelt, lupine, barley, and oats). Putting aside that puffery, they're completely average snacks with perhaps a bit less sugar and a tad more fiber. The strawberry biscuits came two to a pack (four packs per box), and tasted more-or-less like strawberry-flavored fig newtons. Would I buy them again? Given the cost and the run-of-the-mill taste, probably not. They're not bad, but definitely nothing special.
I like the strawberry grain bites as a mid day snack for fiber. They taste pretty similar to nutrigrain bars but a little more “healthy” tasting. Not a 10/10 taste wise but definitely good enough especially for 9g of fiber which is hard to come by in a small snack! I’ve also tried the chocolate filled biscuits which I didn’t like, the cookie part was too dry and crumbly.