I actually ordered memory from memory to go back in September of 2008. The transaction went well the person I spoke to "Rena" was a sweet heart and guaranteed I can return it if there was a problem. Great! That's what you want to hear. The problem is that once I installed the memory which was said to be either Mac compatible or Mac memory, my Power book which worked perfectly fine started acting up. The screen would go black while I was using the machine and would shut down automatically. My screen started acting weird has large lines and one side of the screen was brighter than the other. Soon after I started having problems starting the machine was another problem because it would freeze while still starting, would freeze while logging in, while opening an application. I returned the memory for replacement at least 3 times and kept on having the same problem. I eliminated ever possible issue possible like purchasing a new power cord at the Mac store, deleted all extra picture and video files, and still I continue to have a problem. Returned it with letter, sent emails, sent a registered letter last week and no ones bothers to call me and refund me the money. Even when I told them that I would go to BBB or Consumer Affairs. The employee that's there now Issac had an attitude issue (hung up the phone on my face) when I told him it was ridiculous to wait 3 months for a new set of memory, apart from the fact I waited for it to arrive and a week later they didn't know where the package was, so he came up with an excuse that he was sending a new batch of memory to just return the other one if I received it. Which I never needed too meaning they never shipped it out because USPS had no record of that shipment. Finally I received it on December 26th 2009. The new memory still didn't work I couldn't get the machine to start had all these black lines across the screen I couldn't even see the background when the machine was restarting/loading. I purchased memory from crucial machine has improved since I can actually restart it but it freezes. Today got the power book looked at by another technician I was told the memory is not communicating with the logic board and that I need a new logic board. I am not a happy person right now since, I took care of this machine like it was my most valuable piece of property I had, and these people had to sell me bad memory. I will be getting the info from technician tomorrow and will be filling a complaint with consumer affairs. These people should not be in business if they can not provide top notch memory and customer service. I would suggest that anyone with a problem because of purchasing from them, file a complaint with consumer affairs. I am because, I don't have a computer to work with meaning I can't upgrade my website or accept freelance graphic design work to work from home cause I have a damaged machine. Good luck to all of you but don't ever do purchase from memory to go you will regret it when your machine stops working. These people are very hard to get a hold of. Answering machine at some point won't take messages because it's full. The manager is never there I am always told to call after 4:00 eastern standard time. They haven't answered my emails and always have an excuse that they sent you a tracking number or confirmation and that rarely ever happens.