Such a great shoe, I've had two of the original Calver and just ordered my second Calver 2.
Good grip, barefoot shoes are usually terrible on wet grass or mud but the 6mm lugs, although they reduce the ground feel a bit they really work on typical British wet slippery paths! The lugs also make the shoe a bit longer lasting and more comfortable over rough rocks - I found these great on the sharp gravel of the Camino Frances. They are actually a good compromise for trail running or hiking between something like the Altra Lone Peak and a totally minimalist shoe.
I find these very comfy, they hold the foot well with heel lock lacing in place, I have no issues walking all day in them.
OK now nothing is perfect - the toe area is a little low, so if you put a thicker insole inside you may find them cramped though they are fine as they come or with a thin one. If you are reading this Freet, another 2 or 3mm of height here would be good.
They run small, so go up a size. Again, Freet, your sizing is crazy erratic - why am I a 9 in these but a 7 in the Lundy sandals? I have to order several sizes and send some back each time I try a new shoe!
These are fairly warm, the new version is more breathable than the Calver 1, but I would love an even more breathable version - leave everything else the same but just make the top more porous. These are fine for most of the time in the UK, but they are a bit hot in Spain in summer or in a heatwave here.
If they get thoroughly wet they do take a little while longer to dry out than I would like because of this lack of breathability. But then on the plus side the fabric top is very hard wearing - for me the sole has worn out long before the top shows any signs of wear.
And Freet, please make another colour! These are very orange! A plain black version would make them more use for everyday wear.