I have the 47, yes there is some glare. Its worse than a matte screen but not as bad as some other glossy screens I have seen. During the day with a bunch of ambient light I turn the backlight up to about 70 or 80 and its not a problem. At night I generally turn off all my lights and turn down the backlight to 20 or 30 for the best experience.
I haven't noticed any problems. If there is glare, there is nothing more serious than what I would expect from a comparable television or as with a computer screen, as was mentioned. I watch it in the daylight and at night time with recessed lighting and have had zero issues.
55", And yes with some glare. However I must admit we have it located in a sunny room, and I think any TV that would be placed in that location would have the same result. It's not noticeable when we darken the room or @ night.
Yes, there is a little glare and reflecting, but it's not nearly as bad as a plasma screen. It's not quite as remarkable as LG makes it out to be with their semi matte screen covering, but I personally find it to be more than acceptable. I hardly even notice it after having it in my home for a few weeks. We live in Arizona, so there's LOTS of sun and big windows in our home. Hope this helps answer your question!