When I said "buy into", I didn't mean that there is a monetary cost --- the management service is free, at least at the moment.  I meant that you have to accept that way of doing things, where control of your network ultimately resides out in the cloud somewhere.  As @Tech9 said, that's perfect for some situations.  But if the idea makes you nervous, that's what the cost is.
				
			 
	
 
 
		 
					
				 
 
		