Have had these for about 4 years now; they still look and work great! I put a contractor garbage bag over them each year and store them in the attic and they have held up perfectly.  Each year I have to spread the "needles" and limbs out a bit to re-fluff them but they still look as good as the first year I got them.  NO lights have gone out.  Very pleased with purchase and would certainly recommend to anyone interested in this type of tree.