Before I bought the FireBoard I didn't have the opportunity to make a graph, add comments to it, start a new session, re-label the graph lines and adjust the Y axis to display a certain temperature zone. I think a
test drive would have been valuable and would have probably convinced me to not buy it.
This graph would show more detail and, ultimately be more usable, if the Y axis were just 300-400°.
This chart with a 200° Y axis provides the detail I prefer.
However, I still use the FireBoard.