It's very expensive, that's correct. He's insane if he thinks it's heavy. Yeah, it's the same weight as some hefty glasses, but so what? As for rarely working, I've had long chat conversations using the text to speech, made dozens of calls, and taken more photos than ever before in my life. None were particularly crooked unless I was tilting my head. The battery life complaint is fair, but I just take it off to charge when I'm at my desk. I don't use it while working on the computer anyway.
Honestly, my biggest complaint is that twice now, a software update has bricked the unit. But they are eager to help and replace it.
So yeah, bum unit or he thought he was buying something from Star Trek and was unhappy to find that the real world still has constraints. Basically, it's an alpha-stage toy for rich geeks and a taste of the near future. I don't regret my purchase.