I like that it gives me all aspects to consider when designing my buildings or power plants so i dont have too many things going wrong with what could happen in different conditions during design/construction phases.- The ease at which you can add more components- You don't need lotsa money just some basic knowledge about computer programming (which most people do). Not much dislike but sometimes there are bugs where its not showing right information from input files etc.,but nothing majorly bad:- Its very user friendly!