I've yet to experience an issue with interference in the earpiece during conversations.
And while the Samsung AMOLED screens are nice, the LCD technology LG has employed on this handset is the same as what they use in their HDTV displays. The colors are as sharp as I've seen on anything, and not overly saturated, either.
As for the camera - I really haven't had an issue with mine. Pictures are clear and crisp, and recordings are stunning with HD resolution.