I suggest you use the insurance, no sense in paying $5 a month if not..?
I've seen reports that HTC have a "special" tool to take this phone apart. Ifixit gave the HTC one a 1/10 for repair-ability. It's unlikely you'd get it back together without damage.
HTC One Teardown - iFixit
Previous Phones: HTC Google G1, HTC Hero, Nexus One, Nexus S, HTC Desire HD, Samsung Galaxy SII, HTC Sensation, Galaxy Nexus, HTC One X, Nexus 4, HTC One
Previous Tablets: Motorola Xoom, Nexus 7.
Current: Nexus 5, Sony Tablet Z LTE.