I use both, so I can speak a little about each type:
I use the new design on my Zenith Z5's as well as my 07 Bandit B3's.
I use the older design on my 06 Bandit B3's, Bandit X's, Dynastar Intuitiv 71's and Course 66's.
As far as on snow feel, I actually prefer the current design...I actually feel a little more glued to the ski.
I haven't had a safety issues w/the current design, or pre-releases, and I've crashed plenty on both types.
The older design is FAR easier to get back in on the hill and even though the older design takes less area to mount, I havent noticed any increase/decrease in ski flex over either design.
I like both designs, and although it's easier to get in the older design it's not as impossible as others say it is to get back in on the new design.
For me it's really what the best deal I can find at the time and I'm slightly biased towards the new design because it does seem a little more solid while skiing for me.