For what it's worth, I'm totally happy with LG BP620 3D Blu-Ray Player; replaced an Insignia player. Loads very, very quickly - had the best load times based on a whole bunch of research I did (at the time I bought it - in December 2012). Still working great, and my wife is VERY happy (she would get infuriated at how slow the old player was to load, respond, etc.)
I have two SONY blu-ray players, a Samsung 3d and the LG BP620 3d. The Sony players are very slow. The Samsung is much better, but if I were buying one today I'd buy another LG. Not only is it as fast as a regular dvd, but it upgrades magnificently. It's very hard to tell whether you are playing a dvd or a blu-ray.
I've had the LG BP620 3D player and it has done everything well from playing CD's, upscaling DVD's, and playing cool 3D movies. I have not used any other 3D Blu-ray players so I cannot comment on them.
LG BP620 3D Blu-Ray works best with LG 3D HDTV. There is good communication between the Player and TV. When you turn the Player on, the TV(LG) also on immediately. You can update the firmware easily if there is a new one. Sofar I have no problem with LG BP620 3D Player. Make sure to use good quality HDMI cable.