Love, love, love this drive. The speed is great. I was able to achieve sequential r/w speeds in the 500's. 4k was a little less but still exciting, particularly compared to your standard drive. I have the mSATA and M.2 variant of this drive, and both scream. I'm attaching an image comparing them to a WD Blue 7200rpm drive.SSD's were tested in a Gigabyte Z97 and Zotac motherboard.There is ONE caveat about this drive which I've not noticed in some others (and this could be a good thing depending on how you look at it): It IS temperature sensitive. Performance begins to drop off around 70C. Above 70C, I found the systems rebooted themselves, this is because the SSD apparently ""shut off"" as an overheating protection scheme, inherent to the design.In the M.2 system, this wasn't an issue, as active cooling was available for the SSD, but the mSATA system was different, it placed the drive in the middle of the VRMs, where there was no cooling. I ended up putting some stick-on copper heatsinks on the SSD, and a 30mm silent fan blowing across them. This dropped the temps to the mid 30's, and they don't ever get above 40C. So be advised.