I don't really have any problems with the Quattro 4G, I think some people are a lil butt hurt we cant get any custom roms on it, but not enough people have bugged coolpadamericas to release the kernel source. I really think that's why so many people hate on it. I bet if the day comes we can get a custom recovery and rom on this thing for like android 3.0 or 4.0 people would be like omg! I personally haven't had one issue with mine. I wouldn't complain for only spending 70$ on it anyways.
I been messing around with the overclock on my optimus M, I still use it for music and pictures. I got it up to 900mhz. I am going to pick up another 16gb Lexar sd card for it and do some ram expansion and internal memory expansion. I love the optimus m I wish it was a 4 inch screen.