I like that Darwin can be used for both residential as well commercial buildings (as long you have an internet connection). It's easy enough so anyone who has basic computer skills could use it without much training or assistance from someone else! There are some minor bugs here-and there but nothing major at least not yet anyway!! We've been able get our HVAC system up & running along side of other programs such as Windows 10 Home/Pro etc.. The ability to see real time data in our building is a huge time saver. It is a great tool for seeing what is going wrong in the building. The customer service is the best. Very responsive and knowledgeable. It is very expensive for a small company to operate. It does not seem to be able to see all data from all the different systems in the building. We would like to see all of the data as well as the ability to see real time data.