Prior to the development of engineered hardwood flooring
, hardwood products could not be installed on slab or in your basement without a special subfloor system. Now you can enjoy real hardwood flooring in those areas without all that fuss and expense. A special cross-ply construction eliminates the problem of expansion and contraction usually associated with solid hardwood.
Don't become overly concerned with thinner or thicker top wood layers associated with engineered products because it's the finish you are walking on. Generally speaking you won't need to re-sand and finish these products; just re-coat them unless you need to change the color.
Direct sunlight can affect the color of hardwood stains, therefore closing curtains or shades during peak periods will reduce damage. Area rugs left in place for extended periods of time may expose a shading difference once they are removed from the remainder of the floor.
Large pets with sharp toenails can also damage even the best finishes.