The problem with Google Glass is not the hardware itself, it is the privacy implications of using the device, which sends everything to an untrusted third party. It would be different if they offered the option of never communicating with their network, but they don't offer that as an option. So, essentially anyone who has an agreement with google (NSA, FBI, other governments, other companies, etc) will get copies of your location, pictures coming off the camera, video, microphone data, etc. Those issues alone are the reasons why I would never actually use one. Until Google is serious about separating the umbilical cord from devices like this from talking to their servers, it remains a serious problem about ever using it for anything long term. It's bad enough you might be already using an Android or iPhone device which does almost the same thing, minus the video and audio stream.