I didn’t do the tutorial, just jumped right in. Consequently I couldn’t do much of anything. Before sending students to complete a lab in this simulator, they will definitely need to complete a tutorial. Note that the java-based program wouldn’t work properly in my Firefox browser, but ran just fine in Chrome. I am disappointed that the tool that allows teachers to construct a lab is currently being “revamped,” but I will keep checking back. This could be a great supplemental tool to check in on a student’s theoretical lab understanding, maybe even as homework. But I imagine even the authors would agree that no simulation can replace actual lab time. One awesome feature that the site has is the tutorial feature that allows students to complete problems with guided help. The learning curve to work in the tutorial mode appears to be far less steep than that of performing a virtual lab.