I had an '07 Summit X 151 which I just loved and when BRP announced the light weight '08's I just had to have one. I thought as good as my '07 X was that the '08 would be that much better. It is very powerful and goes through the snow very well but is not nearly as nimble as the '07. It is very light to lift but rides through the snow very heavily. I traded with a friend who had an '07 with us and I couldn't believe the difference and neither could he. I am very disappointed in it and wish I had my '07 back. I am hoping that others are experiencing the same thing and can tell me how to correct it. Maybe adjusting the ski pressure or other chassis modifications. I asked another friend who has an '08 how he liked his and he mentioned the the same thing and I didn't say anything just to see if he noticed it and he had. If anyone has any "substantive " suggestions I would be very interested. If it can't be corrected I am considering trading it off. The weight loss wasn't worth it so far to me.