I have LR 4 and have not seen any reason to upgrade it. I don't use it all that much as I'm a casual photographer. I do however only shot in RAW so when I do use the camera I always use LR to get my photos from camera to computer and do whatever post processing I need/want to do. Now I would like to test HDR and I think that is included in LR6. Ignoring HDR are there any reasons to upgrade to 6? I have read a lot of bad stuff about 5 and 6 but since I have not actually looked at what the changes are I'm assuming that that is just normal as you always hear more about bad things that the things that actually work. How has things like performance, better algorithms etc been affected? Any new must have features for a casual photographer?