Well my bro bought an eMac last month, and the thing went up in smoke within 24 hours.......
However, I personally believe he was just plain unlucky and it could have happened with any machine, from any manufacturer!!
His eMac has been replaced and this one seems fine, the screen is VERY crisp and bright, with absolutely zero faults...... it's the 700MHz model with 640MB RAM and is very, very zippy in OSX..... all in all he's very happy with it!!