At first I didn't receive the item. So amazon sent me another one.
I install it in my less than a year old table PC and it just flew. My 'new' table PC was playing up. I bought it in December 2007 with 160GB HD, 512MB RAM, Vista, etc. It is an ACER Aspire T180-R97z (I don't recommend it). The PC started to slow down almost immediately.
I contacted the company and they said I would need to upgrade the memory to minimum 2GB RAM. I did so and my PC is now wonderfully fast and reliable. I recommend this memory to anyone who has similar computer problems.