I used 2 pairs up til last year when I sold my boarding gear. I liked them. Never had any issues with them. One of the 2 pairs latched a little too well. But it had a special piece of flexible metal to lock it in the closed position much like cabinet latches do that use metal flexibility to 'lock' shut. A plus side is they have a large area that forms over your boot so you don't have higher pressure on the strap areas. I liked that anyhow, it is more distributed. If memory serves correct (varies with model) the large size will barely fit a 11 mens boot. So XL if you are that or bigger. I am also used Switch (dated a bit now) and standard straps. I liked switch a lot but they became hard to find so I got Flows.

They are almost impossible to get into on a steep hill. a consideration if you are planning on taking them into the bc. that and they are heavy and the whole system relies on one cable.