Ive ridden them once and did not like them. They were heavier than most bindings and I found they were harder to get my boots into them snuggly. Most bindings have ratchets so that riders can get a flush boot/binding fit. The locking mechanisms on the highbacks just don't cut it. They can be faster to get into but to get boots into them properly takes longer than regular bindings. And I found that even once they are adjusted properly I still had to make adjustments during the day.
Check out bindings from rome, ride and union. I think these companies make the best bindings.
Cant recommend any models cos u didn't specify how u ride!