It's very easy to use, it gives me an overall idea of what my project will look like in terms of costs and also has all kinds of other features such as elevations which can be used by architects or engineers when preparing plans/specifications etc., I have been able to save time over using spreadsheets because i know exactly how much everything should add up too! The only thing would perhaps improve this program more so than any others out there (which are many) is having some sort of tutorial available where they could walk people through each step from start to finish with ease - but if you're willing to learn then don't worry.
We've saved ourselves hours upon hours every week doing these calculations since we started using them and even our clients love seeing their savings at handover stage as well.