Summary: I've had this 40" set for over two years and have had none of the reported problems. It works fine, has a great picture and has been a joy to use. I have added a sound bar and that makes a lot of difference in the sound quality.
Excerpt: As someone who had become accustomed to living with a 19" TV with no bells and whistles, this TV feels like a luxury. HD channels come in crystal clear with beautiful color, and there are several different input and output options in the back. I'm not very tech-savvy when it comes to TVs so I know I've barely scratched the surface of the potential this TV has to offer. Several HDMI in, a USB in, PC in, etc.
Summary: Bought this for my mother for Christmas. Replaced an old 200 lb Sony. Unlike my Sharp brand TV, I am having trouble with this Samsung staying in any particular picture mode. Sometimes when in a "wide and fit" mode, I'll change channels, and come back and have to reset the mode. This doesn't happen on the sharp TVs. The manuals are extremely complicated and frustrating for an older person, and sometimes don't make any sense for any age person.
Summary: In 2009, I purchased a 46 inch Samsung 46B650 LCD for my family room and I loved this TV so naturally I got this 40 inch Samsung LCD for the bedroom in 2011. Samsung LED are better but I could not justified the cost difference and I rather put the cost difference in a larger LCD screen size. This 5 series has the great picture quality similar to my 6 series that is 2 years old.
Summary: This is a great TV. I am a SAMSUNG fan, and I have 3 other HD SAMSUNG TVs in my house, we got this TV through AMAZON, the video quality is just great, but the audio quality is not comparable to my 42 inch SAMSUNG. I guess they really raise the volumes in TVs starting at 42 inches, but this 40 inch TV has good stereo sound, but is not good enough for a room bigger than 15 feet distance from your position. Other than this, I like the style, performance and cost.