I like that it is very easy for me as an individual user, but also has features which are useful when working with larger teams of users (such as our group).
The software can be slow sometimes if there's too much going through at once or in certain areas such as stock-taking where we have many different departments using this system simultaneously - so make sure before purchasing! We use slim 4 primarily during peak periods/busy times to ensure all orders go out quickly without any errors being made by us manually entering data into excel spreadsheets etc. It makes life easier because then everyone knows what they need from day 1 rather than having multiple people trying to find things individually later down the line.