Recs.
Updated
SpecsUpdate
Pros
Pro Share passwords securely
LastPass provides a secure method to share a password with another LastPass user. LastPass also uses AES 256-bit encryption with routinely-increased PBKDF2 iterations and local only decryption to keep your passwords protected. Two modes of sharing passwords are available: sharing access (password is hidden) or actually sharing the password.
Pro Also a password creator and manager
LastPass can also be used to manage and create extremely secure passwords by using one master password. The service also offers one time master passwords that you can save to be used once if your worried about signing in on an insecure computer. Most importantly LastPass is extremely secure because not even LastPass knows your master password and as a result they cannot accept any government data requests.
Cons
Con Cannot share files
LastPass is only a password management service and can only share passwords not sensitive files. The only way to share files is to use the binary version of LastPass in the browser.