Yes, I skied the Chip 78 when it first came out. On hard/groomed snow it is wonderful and it is damper and stiffer than the non chip version. Off piste I did not like it at all. It was much too stiff with way to much kick in the tail. We were skiing in 12-15 inches of fresh and cut up snow on top of some good sized bumps. Everyone that skied it that day (me, Harald Harb and Max 501) all had the same opinion. This is not a ski that I would own. If I want a ski that will rail on groomers but fail off piste there are many better options (Fischer Progressors, Head I speeds etc). The Chip 78's lack of versatility killed it for me and others.
I have heard good things about the Motive 84. I just have more faith in buying a Head ski that I haven't demo'd than I do a Fischer ski. That Head damp feel is one I know and like very much. I have also had a lot of issues with Fischer skis when I go to base grind them. I have had sevral pairs of Fsicher skis that are bowed. This happens when you don't allow proper time for drying when you put the skis in boxes and ship them too quickly. They ski great until you need to grind the bases. Then when you take a way additional material from the bases you end up with a ski that rails. I had Wille Wiltz (famed WC ski technician) work on a pair of my skis for hours and he could not get the ski to stop railing. I have this issue on my Progressors, and to lesser degree on my Watea 84's (I won't grind them because I know what will happen) and my Watea 94's. It may be that I have just had bad luck, but I am done buying Fischer skis.