I'm sure this product would have been great, but I made two mistakes in selecting the memory type. When I opened the memory cover on my samsung N140 it said 'DDR2 only' underneath the original memory. The above product was DDR3. Also the Samsung N140 requires a 200pin ram and the above wasn't. This meant the little notch in the ram module was in the wrong place. Luckily Amazon have a great customer policy and allowed me to return it and order the correct ram. I don't know why Samsung don't wake up and offer a 2 GB option while ordering the netbook and save all their users a lot of trouble.
Wanted additional memory for Compaq Mini 311c-1101SA netbook, which I couldn't find on Compaq/HP site or on memory manufacturer's selection programs. Noticed Amazon had this linked to the netbook so took a chance. Installed despite Compaq manual and appears to work perfectly.