There's no thread dedicated to this system, so I'm creating one. I have both the original GBA and the GBA SP, as the latter has the lit screen. To be honest, both have horrible screens and, even backlit, it can be hard to enjoy some of the games. I think I'm going to replace the displays on my units with modern IPS screens to better enjoy them. In any case, here is some info on this handheld from Nintendo and two video reviews.
The Game Boy Advance
(GBA) is a 32-bit handheld game console developed, manufactured and marketed by Nintendo as the successor to the Game Boy Color. It was released in Japan on March 21, 2001, in North America on June 11, 2001, in Australia and Europe on June 22, 2001, and in mainland China on June 8, 2004 as iQue Game Boy Advance. The GBA is part of the sixth generation of video game consoles. The original model does not have an illuminated screen; Nintendo addressed that with the release of a redesigned model with a frontlit screen, the Game Boy Advance SP, in 2003. A newer revision of the redesign was released in 2005, with a backlit screen. The final redesign, the Game Boy Micro, was released in 2005.
As of June 30, 2010, 81.51 million units of the Game Boy Advance series have been sold worldwide. Its successor, the Nintendo DS, was released in November 2004 and is also compatible with Game Boy Advance software.