I have a 14" Dell Latitude E5420 w/Core i7.When running CPU intensive processes, the laptop used to get very hot and you could hear the poor little fan struggling to keep things cool. In fact, once while playing NFS: Hot Pursuit (The newest one) the laptop actually went into thermal protection because the CPU crossed 100 degrees (Celsius).On idle, without the fans, it holds steady between 55 and 60 degrees.With fans I'm usually between 38 and 46.So we can easily say this is more than a 20% decrease in heat. And as we know with electronics, the cooler it is, the more efficient it works.I placed one fan directly under the CPU and the other under the RAM.These fans are extremely quiet, so you'll actually forget that they're on!I also disagree with the person that stated that this item cannot be used on one's lap due to the open back design. The fans come covered. And even then, the pad is at an angle so they don't even touch my legs if I'm on the bed. Also, if it's hot, using the laptop on your lap actually helps to keep your legs a bit cooler as well!Be very careful with the fans as you dismount and remount as the clips that hold them in place do seem to be rather cheaply made and will probably break very easily.Also, be gentle with the USB power plug. It also seems to be cheaply made and may break with too rough a use.All in all I have already recommended this product to a friend and would suggest it to anyone whose laptop gets to hot to stay on your leg.I also recommend this highly over the other coolers that have one big central fan. The fact that these fans are removable, you can position them exactly where the problem is.One big central fan with a fancy blue light is pretty... but this one is just purely efficient!Since I've had this item, the hottest I've been able to achieve was 83 degrees. And that was for video rendering at 1080p. All four cores at 100% with Turbo Boost.Buy this! 

Question: How a heating problem can be solved in a notebook computer?
Answer: the poor little fan struggling to keep things cool