I'm afraid I have to disagree. I do like the LS but it has a few flaws that still need ironing out (notes flying around the stereo field, the aforementioned middle C etc) and suffers, like so many other sampled pianos, from needing to be tweaked depending on the style and manner of the music that you're playing. For instance, the Chopin Eb Nocturne demo sound is very nice but the second you start trying to play some leggiero staccato passagework it sounds like its been recorded in a kitchen. You can choose other mics that will work a lot better but then you loose the richness of the above sound. Rabih Rihana's demo kind of demonstrates it: The smoother, legato passages sound terrific but the heavy staccato passage sound almost like max velocity on a clavinova to me.
This is not to say that I dislike the piano; I very much enjoy playing it and it can do many things well and for the price it's a steal; I'd definitely buy it again. But it does seem to have limitations and there are quite a few mic combinations that I find a bit wearing on the ear after a while. Again this is something that I find with many sampled pianos.
I'd love for someone to produce a classical demo that can demonstrate real flexibility in a single work but that takes better engineering chops than I have. There aren't many pianos that can really do it. The old Garritan Steinway was very good in its time but sadly abandoned (I wish their team would have another go at a Steinway D). The Vintage D is pretty good as well.
The CFX is a Yamaha and less colourful than a Steinway but I find it immediately much more flexible. You can go from beautiful pianissimo bell-like tones to furious percussive staccato/marcato passages and everything in-between without having to compromise. I can play a concerto movement on it and not feel like I need to switch presets. For me it's still the standard to beat.