We have a regular customer that has us do their outdoor display. One year their pre-lit tree had a whole lot of burnouts on it. They asked if we could fix it. I said, "Yes, but you wouldn't want to pay the price we would have to charge."
Very labor intensive to fix those things. I would never advise getting one.
If you just absolutely have to have one, get one with LED's. They're supposed to last a lot longer, but beware..........they don't always.
"Unless we make Christmas an occasion to share our blessings, all the snow in Alaska won't make it 'white'." -- Bing Crosby