I like that you can use it as both an add-on or plugin, but also to create your own models from scratch with no experience needed! It's easy enough even if someone who has never used 3D software before tries doing basic things (like creating simple shapes).
Also great customer support team always available over chat/phone :) No cons yet - everything works fine so far. You should try this program out at least once because of its benefits are endless. Modeling in general using sketchup was very difficult without any other programs until now when i've discovered rayelectronic modeler which makes all my job easier!!