The software finds some use with Modular Buildings. From use and review, it does well for your "simple" buildings. When checked against hand calculations usually I am only seeing a difference to a tenth of a psf. It has tabs for Wind, Snow, and Seismic. Other tabs include seismic anchorage for MEP, Snow Drifting, Wind on other (signs, etc.), and wind on rooftop structures. I really cannot comment on the latter stuff, as I mostly use and see the Basic Wind, Snow, and Seismic Pages. It does allow wind loads to be generated in Vasd or Vult pressure levels.
Overall, it is good for saving some time as the load generation portion of the project and tries to automate as much as it can. Like any computer program or spreadsheet it is still very vulnerable to garbage in and garbage out. Also I cannot really comment on anything larger then One and Two Family or smaller Commercial-style projects, as to how well it can help.
My primary use is to check against loads in calculations review for 3rd party Plan Review in Modular Program States and any calculations requested from the PE's I work with.
EIT, Modular Building Industry