Great SSD! I bought two of these, a 250GB for my laptop and a 500GB for my desktop. Both are working flawlessly on day 1. I can notice a difference in boot up time on both the laptop (SATA II) and the desktop (SATA III).
The desktop clone was very easy and I used the software included with the SSD to do it. There are some limitations with the included software though. It can only clone your primary drive. This was problematic for me when it came to my laptop. With the desktop I simply hooked the SSD internally to a SATA and power and booted up, then cloned. I initially attempted to pull the HDD from my laptop and hook it inside my desktop along with the SSD and try to clone, but the Samsung software would not allow it. I attempted another clone software and all looked well, until I installed the SSD in my laptop and attempted to boot. It did not work for me. I attempted to pull three different USB interfaces from three different external HDDs but none of them allowed the laptop to even recognize that the SSD was connected. I guess they weren't configured for SSDs.
Finally, I broke down and went to Best Buy to buy an overpriced SATA to USB cable that came packaged with more cloning software. I ended up having to use that software because the Samsung software still couldn't see the SSD. That software failed initially and I had to run it a second time. Finally, I was up and running.
Here is the one I bought: http://www.bestbuy.com/site/apricorn-data-transfer-cable-gray/3459621.p?id=1218404120715&skuId=3459621
So, for the desktop clone, it was extremely easy using the supplied software. With the laptop, not so much. Lesson learned here, make sure you have a SATA to USB adapter before you attempt to use this for a laptop.
Speeds on my desktop (SATA III interface, 500GB):
Sequential Read: 542 MB/s
Sequential Write: 519 MB/s
Random Read (IOPS): 77507
Random Write (IOPS): 63234
Speeds on my laptop (SATA II interface, 250GB):
Sequential Read: 252 MB/s
Sequential Write: 239 MB/s
Random Read (IOPS): 32698
Random Write (IOPS): 31065
Obviously on an older SATA II connection, this thing will not get the full bandwidth, as it will be capped at 300 MB/s. But, I can still definitely notice an improvement on my laptop, and I am coming from a 7200RPM HDD, which is already better than most laptops. For reference, I am using a Toshiba Portege R705-P35 that is almost 6 years old and still running strong.
Bottom line, this is an awesome performance upgrade whether you have a six year old laptop or a pretty decent desktop. You will notice a difference in boot up time and program launching time. It is worth it!