I couldn't run my web design business without ManageWP. It lets me manage all my client's sites through one easy interface, and has an excellent array of tools to streamline the job. Top quality plugin/service. Excellent support from developers. ManageWP is an extremely cost effective solution - it saves many many hours every week for my business and it ensures my client's sites are always up to date with minimal effort.
I would recommend this plugin for anyone who runs multiple WordPress sites.
Thank you to Vladimir and the ManageWP team.