Pros: I wanted to breath a bit more life into an old PC my wife uses strictly for surfing the internet and a little word processing by adding more RAM. Because it's and old PC I wasn't willing to pay that much to upgrade the RAM to 16GB. It was very hard to find 4GB DDR2 modules at a reasonable price, the ZVVN modules were only ones I could find at a reasonable price. I installed them, ran a quick mem test, and my wife has been using the PC for a few days now, they are working as expected.
Cons: I wish they were available at faster speeds too, such as PC800. I haven't tried and I won't try to overclock them because its an old PC and not worth the effort.
Overall Review: Very Satisfied.
Pros: Was package good shipped in a timely manner and was correct product
Cons: No cons
Overall Review: It was exactly what I ordered thanks