Not really, by the time you pay the deductible, and they send you a refurb, you might as well just bought a used phone. Also, if you sweet talk them, and depending on how long you've been a customer they might give you the contract price for an off contract phone.
not really, my wife ran over her inspire a month ago. We had insurance, so we called it in and we had a new phone in the mail 2 days later. Just got billed for the insurance and it was $125. I'd say that's fair. And cheaper than what you can find used.
How did it shatter? It has Gorilla Glass, which is lamented. It would crack, but not actually shatter. Could be a defect.
The 12 year old dropped it. None of the glass came out, but it is cracked in several places. I think the screen protector kept the glass from falling out. Right now I have packaging tap over the screen to hold it all together.