I've been wearing these legs for a few months now. All in all a great purchase, my computer is a Samsung 7 series so it has rear vents but it seems to help it still stay cooler. I did this mainly to keep the keyboard at a comfortable angle. Has two levels. I mostly use the first prop, but when using an external mouse keyboard I set it to the larger one to get the feel of a monitor. The legs are strong, I have no doubt they will last as long as a laptop. The only problem I have, and it's minor, is that the legs want to close when you push the laptop away from you. You can easily fix it with a locking mechanism and get a damn perfect product.
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