We did the south wall of the house two years ago with the NuCedar Channel Rustic vertical siding and just finished the front of the house with the same. Temperatures here in the Hudson Valley can go from below 0 in winter 10 over 95 in summer. So far there has only been one piece of siding that has cracked due to it's being cut to fit around a window and nailed too tightly on the south side wall. It's a very minor defect considering that wall has over 500 sq ft of siding on it. Homeslicker plus was used as housewrap and the siding on the front of the house was screwed on instead of being nailed due to a design change of the siding. Including all the trim and siding the cost was 9.67 per sq ft for the NuCedar. The south wall done two years ago looks brand new and the front finished just days ago looks incredible. All the insects are gone and the south side has had no insect damage at all. The cedar which is still on the north side and back of the house will be replaced next year is full of pests including carpenter bees. It is also rotted in many places ,even though it was maintained, and was installed in 1987 making it 25 years old. We had the house appraised for a refinace and the appraiser was completely fooled by the NuCedar as she thought it was real cedar. That's how good this siding looks and feels. As for the expansion and contraction factor yes it does along the length of the siding but not the width. However the trim hides it and with vertical siding it is only noticable if there is an unglued joint. I wouldn't hesitate to recommend this product to anyone it is miles beyond regular vinyl siding. No maintennace and a good look is worth a lot of money to me!