Good intro article to Rx. However, there was one part that I felt was misleading regarding hot observables, which are characterized as never terminating. This isn’t quite correct. It’s better to think of hot observables as observables that are producing data whether or not anyone is listening. Ref: http://www.introtorx.com/content/v1.0.10621.0/14_HotAndColdObservables.html