How would you handle subscriptions and recurring payments using Craft Commerce?
At time of writing (22/08/16) - there is no support for subscriptions in Commerce.  You could attempt to do them as traditional products but I suspect it would be a lot of custom work.

It's a very frequently requested feature and I suspect proper subscriptions support will come to Commerce sooner rather than later.  Hopefully much sooner!

In the meantime, the solution most people seem to talk about is the Charge plugin instead of Commerce (or alongside Commerce for other commerce needs): https://squarebit.co.uk/software/craft/charge