Yeah, I think MetaMask is definitely the smoothest way to integrate any kind of Ethereum apps at the moment. I use it as a temporary wallet just for when I need to use dapps like this. Just send in a small amount and use it for whatever you need to do.

I guess it could be used as a serious wallet though. They give you a recovery seed so even if your computer was destroyed, you could get the backup. The only concern would be if someone got your laptop and cracked your passcode, they would have access to your funds.