I have a pair of BD Splits for my Voile Drifters (130 underfoot). They work great, and the weight and bulk savings is noticeable. The one thing that I imagine people complain about, and took me a while to learn, is that, SURPRISE, there is no traction in the center of your ski.
What this means is that if you are climbing a beaten in skin track with ridges or just on hard snow with a flat ski you can "ridge out" on that center strip, and lose traction a bit. They climb tenaciously in the fresh and on a little edge, so I've learned, when this happens, to either step into the fresh or roll a ski on edge to re-engage the fur.
Wider skis are harder to sidehill with when it gets firmer due to leverage issues, so ski crampons are more beneficial to the big boards, FYI.