Living in a Renotated House

We have been living in our renovated house for about 9 months now. We are happy. Here is what happened since we moved in:

• In the first really hot day in May 2009 the outside temperature was 110 Fahrenheit, whereas the inside temperature was 70 Fahrenheit, and it felt so good inside. The central air condition system performed better than I expected, even after the installer could not guarantee any performance metric of his system.
• Two tiles fell of the wall in the dining room area. The contractor sent his person to reattach them free of charge. The new tiles moved a little while the glue was setting, so the contract sent his person again to break the tiles, cut new tiles, and attach them to the wall. Everything was done free of charge within days of our complaint.
• We used cheap Ikea office chairs in the office and and the dining room area. These chairs have hard plastic wheels (not rubber). The chair in the office severely scratched the floor, whereas the same chair in the dinning room area made minor scratches. Using these chairs was our fault, but the new hard oak floor in the office should have been more scratch resistant, because it is the same kind of wood as in the dining room area. The contractor asked the flooring person to refinish the floor in the office free of charge to remove the scratches. Now we use thick rubber feet for all chairs in the office.