55LM4600 is LG's most basic 3D model. It is dimensionally identical to the 55LM6200 but uses black shiny plastic for the bezel and for the stand (which has a different design). It likely uses the same panel as the LM6200 so should perform very similarly to that model, but it lacks all the smart features and has had the firmware crippled. Range of adjustment for picture is impressive for a model at this level. Like all LG passive 3D sets, it uses an S-IPS panel with an FPR layer for the 3D. As such it shares the same strengths and weaknesses as most of LG's LED sets: It has mediocre black levels, but excellent viewing angles, far beyond those of Sony, Sharp, and Samsung. Colors are very good, but the set desperately needs calibration coming out of the box. Motion performance is average for an LED set, not terrible, but not as good as upper tier LED sets and nowhere near that of plasma. The glossy screen is prone to reflection. It is an edge lit LED which means you do see some flashlighting and uniformity issues, but in my experience any cloudiness is minimal to unnoticeable. 3D is very good. However, while I did not have any problems when sitting to the left or right of the screen, the vertical viewing angle was an issue. You need to stay at eye level to the screen or the 3D begins to ghost really bad, so any time I stand up, you might as well say it is not 3D anymore. When sitting, it is darn near perfect, with no ghosting/crosstalk at all. It is actually a better experience for me than when I have watched 3d in a theater.