Was wondering about whether I should write about this RAM what ever after already 26 pre-reviewers have rated this store only positive. No matter - I do it for them and can recommend them without hesitation RAM module. My 5 year old laptop had about 2 GB DDR2-667er RAM, and I wanted to, because upgrading in top condition, to 4GB. I ordered therefore slightly faster DDR-800 variant. Result: it was recognized immediately, no problems, perfect (tested under Win 7 64bit). The Win7 benchmark spat a value of 5.0 for this memory out - ok for this older technology.
Conclusion: whosoever needed and how I want to upgrade: Buy! Especially because the price plus is relatively low compared to other brands.