MEW is probably the best and most trust wallet out there, and that's for several reason. First of all it's a decentralized wallet, which means it's non-profit and no one has to gain something from depositing or withdrawing coins (which is very important) secondly, the platform is not storing any type of private or public keys, which makes it extremely safe but at the same time you risk the chance of losing these keys by yourself, which in case that happens you will not be able to retrieve them from MEW. It's a double edged sword like anything in the world. But it is still the safest and best and probably most widely used wallet out there. I hope to be seeing more of these open source projects popping up. MEW started from nothing and look at it now.