The ability to create custom views of my aircraft, as well as being able to add multiple models at once is great! I have not found any feature that would be considered negative so far in this program. It has been easy enought for me (a non-expert)to learn how everything works together without much difficulty or cost associated to learning it myself. This software will help you get your project completed faster than if there was no assistance available from an expert like yourself who can guide along side you every step of the way, when needed. Being able to use all aspects of our product line while creating/planning projects makes things easier for us too because we are only one person instead of having two people doing different tasks.