The look & feel is very intuitive, easy to use even if you do not know how it works at first (my son was totally new but in about 30 min he figured everything). Easy setup with little/no documentation needed as opposed compared wtih other solutions such s Thunderbird or webmail providers like Gmail from what i understand.. Very simple tool that solves its main purpose well! I just wish they offered more features than only secure chat functionality - maybe later when someone figures this one into their plans?? It's definitely getting rid off some spamming issues our organization has been experiencing since forever now!! Highly recommended considering we are an intranet-only provider which handles mostly health related content so privacy concerns were also solved by default due security requirements within HIPPA guidelines here where located!! The email features of paubox are very versatile. The UI is very clean and easy to use. The support is also very helpful and quick to respond. Nothing really, I have used it for email and it is very efficient. It is a good email client. I have to give it a thumbs up. It is very good and efficient email client. Email forwarding and secure email features are very good.