Pros: Installed this 8 gigs of G.Skill on my Lenovo SL510 laptop. Factory had installed 2 gigs, so on Win 7 this is like a newer fast laptop!

Cons: NewEgg's memory configuration app picked out a similar module but it wasn't 100% correct according to G.Skill's excellent technical support. I received an answer back via email in less than 24 hours!

Overall Review: I highly recommend you contact G.Skills technical support for pre-sale recommendations on memory. I was concerned after reading several disappointed reviews that appeared to be because users did not utilize the correct memory. G.Skill offered to exchange via RMA, which is awesome, but even an experienced Analyst such as myself was not 100% sure what EXACT memory to purchase for best performance despite the information from NewEgg's memory config app. I'm glad that I contacted G.Skill FIRST to save myself and everyone time and hassle. This is not my first time purchase of G.Skill memory and it won't be my last! It's great quality just like other popular brands but it's cheaper. So don't let the price fool you - this IS a high-end brand and their Tech Support is top notch. I'll continue purchasing G.Skill for my memory upgrades and will continue to recommend G.Skill to my friends who seek my advice often on technical information. Thanks G.Skill!

Pros: I bought this unit from NewEgg May 2011 and have had no issues. I am using Seagate "green" 2TB approved drives and they are working well. I've filled all bays with the same drive and the unit automatically builds with no problem. Speed is excellent even with the 5900rpm drives I looked at a lot of different units and decided to spend the extra $ to get a better quality unit. Community support and extras are a plus.

Cons: It's expensive, but you get what you pay for.

Overall Review: Definitely read and be careful what drives you use in this unit. Only tested and approved drives should be used, so keep this in mind if you think you're going to stick in any drive and it will work. It won't. Follow Netgear's recommendations and you'll be good to go. I use this as a home NAS and opted for the slower Seagate 2TN green drives, but it's so fast I do not see the need for faster drives.