This desktop replacement from ASUS does some great things, and some critically bad things. While most 15.4-inch screens don't hit the desktop replacement category, the C90S achieves this by pure virtue of including a desktop CPU instead of a mobile one -- the Core 2 Duo E6600. This has two ramifications: it's inevitably faster thanks to operating on a 266MHz bus, and also produces a lot more heat.
This is the C90S's achilles heel -- when typing it's actually uncomfortably warm from the amount of heat that leaks through the chassis up to the palms, and things get sweaty in short order. You can work around this by typing with your wrists off the wrist rest -- but that kind of defeats the point. The touchpad and mouse buttons also heat up rather uncomfortably, which is enough to put us off the entire laptop.
A large protrusion at the back claiming to be the "Turbo Engine" does its best to keep things cool, and while we experienced no heat related crashes, when the machine was under load the Turbo Engine spun up like a jet taking off; silence is not this laptop's strong point.
For the size, the speakers were also a little underwhelming. While tonally they were quite decent, the tendency to clip, distort and vibrate entered at a lower volume than expected, requiring us to lower below half volume on our test tracks before the distortion stopped.
If ASUS does something well, it's features. The inclusion of HDMI is very welcome, but even more so is the eSATA port on the side, meaning vastly quicker transfer speeds to external hard drives than USB.
There are three USB ports -- two on the back and one on the left. The left side is the home of ports, with modem and Ethernet, VGA, S-Video, microphone and headphone ports, mini Firewire, Express Card and an aerial port for the built in TV tuner, on top of the aforementioned HDMI and eSATA ports. The right is sparse by comparison, only housing the DVD+-RW, the front similarly so with an MMC/SD/xD/MS card reader.
A fingerprint reader sits between the two metallic mouse buttons, a 2-megapixel Webcam nestled in the top of the screen, the latter able to twist 180 degrees to take a view behind the laptop. Twin microphones sit on either side of the Webcam.