Have you ever had any problems with the reclining highbacks? Do you think the I-straps are an improvement over top-caps?
The only problem I've had with the highbacks is that it became unlocked once during a crash. It wasn't from a jump or anything though. I just lost my edge and slid down on my back head first. In the process of the slide, one of my highbacks caught ice patches and unlocked.
This only happened once and it didn't make anything worse. I was rather embarrassed though
To be frank, toe straps give you more response. I won't deny that. However, they aren't that much more responsive. I can do anything in my Flows that I can in my Bosses.
The biggest benefit of the Flows for me is the comfort. As comfortable as the Bosses are, they do not hold a candle to the comfort of my Flows. This is just an inherent problem with strap bindings. They cause pressure points. Flow doesn't. The cap evenly distributes the pressure.
If you have never used Flows, it does definitely take some time to get used to. If you want the cap to be tighter, you will have to learn techniques to kick in properly. My first time on Flow bindings, it took a day of adjusting to the feel and kicking in aspect. I can now tighten them down and still kick in very easily.
My Flows were my binding of choice for last season's test fest (demoed like 34 boards in 3 days) and I will be using them for this year's test fest.
Comfort > a little more response... Anytime of the day for me.