I suppose many of you know I've have a few issues with this MBP, but only two replacements (a bracket and a charger). According to memory clean I have 1.6 gigs of a 4.0 gig hard drive free. With that app, it has probably given me time before my MBP's memory was drained to nothing. When did you all upgrade memory? It's a mid-2012 and I have had it (brand new) probably since January 5th of 2013. Its been pretty sturdy in the long run, so I think I'll keep it until it turns into a unrepairable "doorstop". if I need to look at an app in the MBP to tell how much memory I actually have, please let me know. I am solely depending on what memory clean is telling me. Thank you.