Seems fine

Desktop had 6 GB of RAM (seemed like an odd amount), and I felt that was insufficient for running Windows 7 Professional 64 bit. I installed 4 pieces of 4 GB, which is the maximum my machine can recognize. Installation was smooth and easy, and there were no problems. I can't speak about longevity, but I don't see any reason why it wouldn't last. Memory in general is one of the easiest upgrades, and the price was very reasonable. The best part is that I ordered the wrong memory the first time. I ordered 2 x 8 GB memory modules, and my computer can recognize only 4 GB modules. They allowed me to return the memory that didn't fit my machine, and order the correct ones. THAT is why I buy from from them, and why this is such a good deal!