I used to have a few of the Flows regular bindings. Quick and easy to get in and out, worked great, but definitely not as responsive as 2 strap bindings though.
I got their toe strap model when it first came out. I believe they changed once since then because they knew the toe strap needed help. Not sure if they've dialed out their problems yet or not.
I'd have to re-adjust the straps every time. It was a big pain in the butt.
I wasn't happy that I just wasted $350 for a product that should have had better R&D before being released. Within the first day or two on them I was so aggravated with them I got rid of all my Flow bindings and haven't looked back.
Gnu also has the Mutant that is quick entry.