It's very easy for use, it has all functionalities I need in one tool (it can be used as an ERP system too).
The UI could have been more modernized but everything works fine! There are no downsides at this moment; just try it out - you will love how simple your life becomes when using such tools ;-) We manage our business process flows from my desktop PC where we do not only work directly within SAP Business One application itself but also via web browser by accessing any other computer or mobile device that runs internet-enabled browsers like Google Chrome / Firefox etc., which makes me much faster than before while working remotely/offline without having access to actual software installed locally on each client machine.