MyEtherWallet is a tool that is oriented for more advanced users therefore it is powerful. Many will not feel comfortable using it but it is still masterful. Being an interface, it provides a bridge between your computer and the blockchain, but it is not capable of storing personal or specific account information.
It is a totally free service, since it constitutes an interface between a browser and the Ethereum network.
This is one of the most versatile and free services available, and therefore receives rave reviews. The most common complaint is that it is an advanced tool, not recommended for beginners. However, there is plenty of documentation online to learn how to use it.
In conclusion, MyEtherWallet is the most suitable way to get involved with the decentralized nature of cryptocurrencies. It is one of the most powerful and versatile interfaces on the network. Consequently, it is not a recommended platform for beginners.