The Alpha A99 has a better display than most cameras that have been around for around the same time as it. This digital camera has a TFT display, whereas most cameras of a comparable age and spec to it have an LCD display. TFT LCDs provide better image quality and higher resolutions to earlier LCD displays but their limitations are narrow viewing angles and poor vislibility in direct sunlight.
A TFT display is actually the best display across all SLR digital cameras that have been around for a similar time to the Alpha A99.
Across similar types of digital camera the worst display is LCD.