I have and use Pro. It works well with my estimating software and it's fairly simple to use - once you get it set up correctly with your chart of accounts, etc.
However, my CPA said I could have gotten away with using Quicken. What does your accountant recommend?
My cpa said I could probably get away with simple start being that I was a small company with no employees but she does not have much experience in the simple start and told me to research first so that I would not buy it then find out I needed pro.