There are several great tutorials on their site.
Product is very compatible with Zbrush and Daz from the literature. If you can make a short collada animation from your pose, that will import along with your object avatar. Their example started with a short animation in the T pose, which you would design your pattern to fit, then set sewing lines and sew. You run the simulation that drapes the clothing, then you can in 3D simulation run your collada to pose, then pull, tack and adjust. This is where the powerful video card is required. Patterns can be designed in symmetry and manipulated for correct normals. Settings for gravity and wind, texture for bump and pattern for color, similar to other programs. Preset library of assets, avatars and poses, quite a variety, but simple poses.
I am not sure about compatibility of the latest release with older versions of Windows OS. but there are older versions of Designer available it seems. I am on the trial version, but if I had the video card power, I would buy it in a heartbeat.