I have it in the OptiBay as companion for the Vertex 3 SSD... Works perfectly... (except a click sound once in a while which I haven't figure out where it comes from... )
Well its listed as 5200 rpm, vs 5400 rpm on the stocker. I thought that was strange. I have read about the shock sensor issues but they died down so I wondered if that issue had been fixed...
Also wondering about lesser speed due to the slower rotational speed and and added heat or diminished battery
Its a newer two platter design so it can have a slower rotational speed while still maintaining a high throughput. If you look up speedtest/benchmark comparisons on the drive it was one of the fastest 1TB 2.5in hard drives.
glad you approve... i still need to learn more about RPMs... but its my first macbook pro. so i didn't have much to compare it to besides a core 2 duo macbook.... so 5400 rpm is enough for me....im thinking about adding a sad and taking out the optimal drive because i don't use it... lOL