My biggest issue with those is that sometimes their cooling solution is ridiculously bad. They have a next-to-nonexistent heat sink, so the fan needs to spin like crazy to cool it down. Bonus points for the fan stopping from time to time, so it has to spin even faster than it would need to if it were running all the time.

Had this is an older HP laptop. My newer one lets me configure it so that the fan spins all the time, so it's very quiet as long as it doesn't do anything.