HI Brandi,
I'm not sure if this will help you, as it is more of a comparison between OneSite and other property management software providers, but here are a few resources:
We use it. There is a discussion group that my One Site guru participates in.. let me get you details!! They all have flaws as I'm sure you have experienced.
Hello! I am curious about the software that a lot of companies are transitioning to, OneSite. I have experience with MRI, Yardi, AMSI. What is the best resource to learn more about it?