some of the heat of the internal components is absorbed by the plastic case. by cooling off the case, it allows it to absorb more heat. it's like when you blow on hot food to cool it down. follow me?
i would definatly not remove the bottom of the notebook. It is more than likely that dust and other particles would enter your notebook. i'm using the lapcool for my mitac and it has made a huge difference in both reducing heat and the...
the acer is the safest bet in terms of quality and service. ibuypower is a crap shoot with quality and service from what i've heard. It also depends on what you plan on using this laptop for, if it's just for every day use, i'd definatly...