My Monitor is always smooth and i never hard vsync only using adaptive at 120. I have 2 GTX570s overclocked and running in Sli for my PC gaming so is normally around 120fps (althourgh some games are a tad lower around 90fps) and is always at 120hz anyway. Also its easy enough to manually enable Lightboost no fiddling required, but is pointless in 2D as it buggers up your gamma and brightness. The downside to the monitor though is that no console on any TV is smooth by comparison due to the lack of power the consoles have.
My PS3 is on the LG TV in another room and the 30fps of console games is my bug bear but nothing can be done about that but does make it feel so slow and unresponsive. Cant say i notice any motion blur though.
edit: yes i know the difference between true refresh rating and 'motion processing' rating. As you can see at no point did i say my TV had fresh rating of 120hz.
Oh and one last thing regarding lightboost, if it is enabled (ie in 3D mode) you have very limited control over other settings. So any user settings such as colour correction, gamma, sharpness are all disabled.
Edited by Sharzam at 20:56:57 26-06-2013
Edited by Sharzam at 21:05:24 26-06-2013
Known as 'Sharzam' in 98.5% of games