I stopped using Dropbox after the whole Condoleezza Rice thing and have been using a mix of Google Drive and OneDrive and I must say I like them a lot better. They do the same (and more if you use other Google Apps) and prices are cheaper. Are there any benefits to using Dropbox?

Are there any other real alternatives you could recommend to give them a try?.

To the best of my knowledge, the only provider listed above with an official linux client is Dropbox. It works for me.

Google Drive has a very unofficial yet supposedly usable 3rd party client at http://www.lbreda.com/grive/

https://github.com/Grive/grive

There is also a FUSE client written in OCaml:

https://github.com/astrada/google-drive-ocamlfuse