Pros: Has greatly improved the performance of my 7 year old HP HDX16 laptop.

Cons: Kept freezing up initially. Bing came to rescue!

Overall Review: I installed this as the internal bootable drive on my 7 year old HP HDX16 laptop (4GB RAM) that has Windows 8.1. Now the laptop runs faster than the new i5 machine that I have from work, for most day to day tasks. Even Lightroom 5 is usable! One issue I did run into was, the drive kept freezing after initial startup when I used it as an internal bootable drive. I had to disable “Acronis Nonstop Backup Service” to resolve the issue. (Run-> services.msc, then double click on the service, select Disable from Startup type drop down and click ok.) Now the drive works like a champ. If you have Acronis installed on your machine you might have to do the same if you are planning to install it as an internal bootable drive. This was not an issue when I used it as an external drive. If you are looking to squeeze the last bit of juice out of an older machine, upgrade to SSD would be money well spent.