I went through the included tutorials, then a few from this youtube channel:
With that, I've been able to pull off everything I can think up, except for complex curves.
The only annoying part is that every single thing you do is recorded in the file, so designs you've worked on a lot and redone parts of get so complicated that they take longer to load and sometimes get glitchy. You can work around this by saving individual pieces as stl files, then importing them into a new design file. Then they only show up as one shape instead of all the shapes & changes that went into making them. Of course you can't undo or ungroup the parts that went into it.
You can also copy and paste from one design to another, which is helpful.
EDIT: BTW for some reason I can't access the drop down menu to change the snap grid size on the new Beta version (lower right corner of grid area).
I can click on it, but the options are always hidden behind the tool panel or right edge of the screen. Could be the 1600x900 resolution on my laptop.
If you have the same issue, you may want to use the Legacy Design option.