I love my Cooler Master Notepal Ergostand. It's been a while since I got it and have never done a proper cleanupt. If you don't use an air duster often you will have to manually clean it.
Initially I got the cooling mat for the Lenovo X201 Tablet to give the system a nice angle and for that it worked very well. Now I use it on my HP DV6T QE. The HP DV6T QE does get hot when playing games and doing resource intensive tasks. I recommend getting some kind of cooler mat to prolong the lifespan of your system. FYI it never worked too well with the X220T.
Anything with a fan will collect dust. Heat is the enemy of pc components and a good cleanup will ensure better performance.
- Lenovo X201 - Cooler Master Notepal Ergostand
- Cooler Master NotePal Ergostand (official blog post, official website, amazon)
- Image search "dirty computer" for horror images