So far, so good. The tutorials are great, and documentation relatively well populated. Installation was painless. The major quirks so far have been due to funny interactions between Windows Chrome and DirectX, which I won’t pretend to understand, but apparently it makes it so outlineWidth is not supported, which means all polygon outlines are set permanently to 1px. Not a huge deal, but I’m guessing I’ll run into more technical stumbling blocks as I delve further in.
Note: must use WebGL-enabled browser, which means Chrome or newer version of Firefox/IE/etc. You can check if your browser is compatible here.