fix(info): fix on advantages

Author: Guikingone

service_container/injection_types.rst

@@ -328,11 +328,13 @@ so, what are the advantages?
 * Your service becomes immutable, as the container will return a new object, 
   the initial service stays clean and unchanged.
 
-* You can easily change the injected service as long as it respect the interface 
+* You can easily change the injected service as long as it respect the interface/type
   asked by the initial service.
 
 * It allow you to get rid of factory usages which can lead a more complex code
 
-The disadvantages of this approach are:
+* As the dependency is optional, you can easily decide to receive the service
+  without using the "with" method.
 
-*
+* As the method automatically receive and set the attribute value,
+  you couldn't obtain a new service without this dependency.