I like how easy it was to use, my team members really enjoyed using this system as well! It took us about 10 minutes each day just learning everything we needed to know in order to get started with our projects. There are some things you need experience or knowledge on but if your willing to learn then there's no problem at all getting up-to speed quickly. We used Stons Proposal Manager mainly because what they provide has been very helpful so far. The user interface makes creating proposals simple enough that even beginners will have little difficulty working through them without assistance from an expert.