I'm using CS5 and LR3. I currently am not using any plugins, and although the power of CS5 and LR3 is amazing, I hear from users of Nik that their suite of plugins (Dfine, Viveza, SilverFX etc, and the forthcoming HDReFex) really add value. Users seem very enthusiastic. I like to go for one suite with a common interface, rather than cherry pick from many different vendors. Strongly considering the Nik Complete Collection for Lightroom (can't afford the Collection for CS5). How do you like it? what are its strongest and weakest features?