Myetherwallet (MEW) has a lot of advantages. It is easy to use, does not store your private keys, and it has the best support for new tokens.
I don't understand how people can say this. I get that MEW has been highly trustworthy so far but I'm coming from Mist where I have to upload my existing JSON key file and enter my private key password to a web server. Why are you all so sure that those details are not being captured and saved on web server disk somewhere and/or being re-routed for some big cash grab some day? I'm playing devils advocate here, of course.