No problems with the memory. Just the installation.
Review by confirmed purchaser
I followed a YouTube interview to install the 2G RAM in my Acer Aspire one. It told me to disconnect the keyboard to access the memory. Installing the memory itself was easy, but after reassembly I lost use of the keyboard due to the extremely fragile connection being somehow damaged. In retrospect it was not even to be necessary to disconnect the keyboard (thankyou, whoever posted that video). However, using a USB keyboard (or a mouse with a virtual keyboard) I can use the computer and its performance is very greatly improved compared to before.