The best part about this program is that it has some of the most comprehensive graphs for bond and interest rate risk analysis. It is very easy to use, even if you are not an expert in the field. I like how they have all of their functions organized into tabs so that when I need to access them, I can easily find exactly what I am looking for. There are many other programs out there that do similar things but 20-sim stands above the rest with its ease of use. We are able to track our portfolio and see where we stand relative to our target return. This helps us to make adjustments as needed.