Google Drive doesn't work, at least for me. It won't reliably stay connected. There is no reconnect option either, so every time it disconnects you have to exit/restart and then it has to re-index all the files.

Sharing is clunkier, when you share a folder with somebody it doesn't appear in their drive. After they accept they still need to go into their options to get it to start syncing.

There are a lot of Apps that have Dropbox built in. They use Dropbox as their storage.

I feel Google isn't putting the effort into their Desktop client that Dropbox is. Google wants people to use the web. They are both cheap enough price isn't an option.