I had it on my phones for years and have yet to use it so I took it off last year. Your phone is covered under manufacture warranty for a year. I'm responsible with my phones and since I buy a new phone at least once a year, it was just money being given away to my provider. Any phone problems I've had fell under manufacturer warranty since it was defect and all you pay is the s/h charge.
I can see if the deductible was $50 (as it is with regular phones), but it's $110 and I have found used, good condition bb's on craigslist for almost the same price. Now between paying a deduction of $110 for a refurb phone (if you need to use insurance) plus the $72 spent on insurance for the year, I just don't see a point, especially if you know you're responsible with your phones. That $72 saved along with my sale of phone/accessories pays for half of a new phone outside of contract and it allows me to upgrade when I feel, not just when my contract is up. If I suffer some cosmetic damage that really bothers me and I wish to replace, there's plenty of tutorials and small part bb sites like cnn.
I guess insurance is a good bet for some, just not for me.