ok. will elaborate now. first, i think they are heavy as hell. second, with most models, i am generally not impressed with the layout from a fishing perspective. third, i've seen more than a few where the wheels are toed out a bit. fourth, i think their walls are still made of wood which seems to me would be somewhat prone to mold and mildew once moisture makes its way in. fifth, i believe some of the older models used bat insulation which would also be susceptible to settling and mold. finally, when i look at my friends ICs who are going on 5-10 years old, they simply look beat up... rusty frames, caulking coming apart at the seams outside, windows that don't function right anymore, etc... just a lot of little things.
caveat... new models have probably fixed or rectified a few of the things i mentioned above. but, in general they just seem too heavy, not fisher friendly and not exactly made to last for my taste and the price they command.