It is very easy to use, you can easily add your own calculations as well! I love how it allows me to keep my documents safe online even if i have no internet connection or if my computer crashes. Sometimes its difficult to see certain things such as dimensions while working with this software but once again that's just because of my lack of knowledge in using this program. If you are looking for something that helps you calculate all kinds of structures then go ahead and give bidstructuralsteelonline a try. It has helped us out so much! We used to spend our time calculating everything by hand which would take days sometimes weeks. With Bids we have been able to save so much precious time since now we don't need to do any complex calculations anymore.