When I first saw Tannus I thought they where a copy of Greentyre, but then I discovered that they are of a completely different material. I have used Greentyre on my old Mountainbike so I have experience with that tyre and would like something a little less stiff. The pins are a great idea, I once had my Greentyre fronttyre starting to worm of the rim in a thight corner. I currently ride on Marathon + but are contemplating a change to Tannus when they are worn out. I like not needing to have a repairkit with patches that dries up, pump and tools to take the tyre off and on and it's also nice not needing to check up the pressure on the tyres when you take the trike out for a ride.