It's a larger-sized representation of the firmware already present in the phone itself, rather than a completely unique UI with limited software availability and choppy performance.

ENGADGET: Motorola ICS UI review: this isn't the Blur we used to know

From now until March 3rd, I'll experience nearly every aspect of BB10: the UI and its learning curve, its performance and battery life, BlackBerry World, the highly praised virtual keyboard and how well it can handle my work load.

ENGADGET

The innovative TAICHI UI and high quality volume controller also add value and performance to the entire operating system.

ENGADGET: HiFiMAN launches HM-901 'high resolution' audio player, we go ears and hands on

Images were bright and fluid on its massive screen and Huawei's lightweight Emotion UI didn't appear to compromise the device's performance on the 1.5GHz quad-core processor.

ENGADGET: Hands-on with the Huawei Ascend D2 (update: now with video)

Henry Goodman won best performance in a play for The Resistible Rise of Arturo Ui, also from the Chichester theatre.

BBC: Imelda Staunton wins theatre award for Sweeney Todd

The design, the UI, is what you see of an app, but the underlying architecture and how it effects performance is what you feel.

FORBES: Client vs. Server Architecture: Why Google Voice Search Is Also Much Faster Than Siri