I've got this device, and while it's great on power and responsiveness, I regret buying it, especially at launch. The current radio for LTE has issues. Google has hundreds of results of people complaining. The LTE signal will just die, and it will cause the entire handset to sit in searching for signal. No LTE, No 3G signal, everything will drop out. Verizon has acknowledged there is a problem but the only solution they have is to keep swapping out handsets until one works.
for more details and snippets from the logs on the devices.