Have just found this Polish HDTV site that have reviewed the 55" version, and they pretty much say its the mutts...
Toshiba 55 L7453 - test tv lcd. Model CEVO ze strefowym pod¶wietleniem led - czyli uczta dla oczu. - HDforum
not sure how well this this translated, not being an av expert, but this is what they say are the Pros & Cons...
Pros:
Sensational sound
Equal's backlight
Award-winning Design - reddot awards
Modern design
Sensationally Low Input Lag - Hello Master!
Good multimedia capabilities
Simple and fast configuration of Internet
Very good color saturation
Excellent scaling SD!
Very good sharpness
Excellent liquidity: vertical, oblique and lateral.
Open browser
Recording on hard drive with USB
Wifi Miracast
Very good cooperation with external applications
It works with a keyboard and mouse
Applications for mobile devices
Very good black structural
Cons:
Image calibration required.
No rotating stand.
Lateral angles not master
Lock vibration amplitudes at long
The remote is not sensational
Input lag looks amazing for gaming...I think they recorded 7.8ms average