I bought one of these for my Asus EeePC 1001PX 10" netbook, as I thought it could do with a boost in speed. The upgrade arrived within 3 days, and was well packaged in an anti-static box with installation instructions included.
Installation took only minutes. The only problem I experienced was that on boot-up, my computer failed to recognise the installed memory, and was still showing only 1GB in the control panel. I did a Google search, and it turned out this is quite a common problem with this machine.
The remedy is to shut down, then restart whilst repeatedly tapping the F2 key, until you get the BIOS screen. the new memory should show up on the first screen. In my case it didn't register in the BIOS initially, but I proceeded to the second part anyway, which was to exit BIOS & save all changes (you can do this by pressing F10).
When I rebooted, the memory showed up correctly as the full 2GB, both in the BIOS and in the control panel. I've now noticed a marked increase in speed, even with such things as scrolling and switching between windows when I have multiple applications running.
So, I'd definately recommend this upgrade. Don't be disheartened if your computer doesn't recognise the additional memory initially, it's just a glitch. Just follow the above procedure and all should be well.