installing CM9 is easy, after all I did it, on an iMac too. It's a pretty stable device now - only issue I have is that sometimes the wifi is lost and takes a few reboots or other fiddling to get it back. Otherwise, web browsing, ebook/ pdf reading and even games are fine. Having said that I'm probably going to trade mine in soon - I'm selling my 11" macbook air because it's really too small to be useful as a main computer and may go for a Asus Transformer Prime. In which case having two android tablets may be a bit silly.