I'm on a limited income and this gives me the opportunity to add on as I can afford new components. I'm very impressed with the Magfast Company, and look forward to building a more convenient charging situation as I start my small direct sales company that will include many things that need charging as I go live online. User's recommendation: The option to buy the Pro Unit all at once is a fantastic savings if you are able to afford it. I'm having to start a new way to generate income at this point in my life so having options is the best way for me.