Denny McEntire wrote a review of K2 Snowboards Mini Turbo Snowboard Bindings - Little Boys' on May 8, 2014
Familiarity: I've used it several times
I got these for both of my kids this season. I like the simplicity of the single strap, and they were snug so there was no slipping up in the heal.
They seem to be made and sized specifically to be worn with K2 boots. My kids were in Burton boots, and so these were a little small. They had a hard time latching them on their own. I even found it difficult to latch them. I have been told that K2 boots are less bulky than Burtons, and that these would probably work better with K2s. If you're thinking about getting these to use with a bulkier boot I would consider ordering a size up to see how that works.