I have a mid 2011 iMac running Snow Leopard. It's great, but I think it's time to upgrade. However, beforehand I have a few questions. Is Mountain Lion stable, or is it buggy? If it crashes things and it's buggy then I will not upgrade. Since I am going from 10.6 to 10.8, will I get the 10.7 OS X Lion features too? I know it may sound dumb, but I just want to make sure And lastly, is it even worth it? I know this may be over-asked an such, but I really don't want to upgrade if there is nothing new, nothing refreshed. I am a patient man, I can wait until 2013. Thanks in advance to anyone who answers. Forgot the specs: 21'' mid 2011, 2.5 GHz i5, 4 GB of RAM (thinking of upgrading to 8). (Sorry if my English is wrong or something, not a native speaker!).