I like that it's easy for me as an engineer who has never used this software before (but is now learning) - It really helps if you have some knowledge about how hydraulic systems work! Not so much anything else but not having been able to use or try out any other products made using PF could be considered negative because of all its benefits. This product allows us create accurate models with very good detail which makes our job easier during construction projects such as tunneling. I like that it is easy for me as an engineer who doesn't have much experience with 3D modeling software to use this program because of its simplicity. It's not very user friendly but once you figure out how everything works then there isn't anything wrong with using this product. This has helped my productivity by allowing me to quickly create models without having to spend hours learning new techniques or spending money buying other products just so i can get what i need done fast!