Recs.
Updated
SpecsUpdate
Pros
Pro Best beginner's option
Materials are very well made and it'll get you started with the technology as fast as possible. Haven't found tutorials that well made and understandable.
Nothing is skipped or assumed without reference to courses within that were recommended to you earlier. This makes the site an efficient review resource if you ever forget a basic concept.
Pro Workspaces
You don't have to install anything to your computer and can learn from anywhere using their Workspaces.
The effectiveness of this tool cannot be overstated. Even though instructors often preface courses with installation guides to setup popular environments the Workspaces allow you to jump right in, mimic the examples, work on your project, experiment with tangent thoughts, or even complete parallel courses simultaneously, within separate Workspace instances. Execution is very fast and space is ample.
Cons
Con The quality is inconsistent among courses
Treehouse has multiple teachers in order to provide such a variety of content. However there is a lack of consistency with teaching styles - Some courses provide content that is well explained and goes at a reasonable pace. Other courses can be quite hard to follow. The challenges are also inconsistent - Some are too easy and don't reinforce much of the material learned.