i have been using MEW for 3 years now ... and its a great wallet .. easy to use. i do pre-sale ICO buy and i am using it for that purpose only and occasionally sending ETH to the exchange.
Pros
its easy to use and you can set the speed of the transaction.
supporting smart contracts and you can buy ICOs in pre-sale because of that.
Cons
you can be hacked if you are not really carefull or be a victim of phishing
a new interface will be better.
MyEtherWallet is considered a highly flexible user interface to access the Ethereum blockchain network. It is a free-to-use, open-source platform that allows users to create cryptocurrency wallets that operate securely on the Ethereum network.
Pros
1. Free service
2. Open source
3. Clear, easy to understand ‘how-to’ videos
4. Never stores sensitive data on the MyEtherWallet servers
5. Support for offline cold storage transactions