Stuff about C++11 that I like... #1 Inherited Constructors

Inherited constructors make life easy.

Depending on your mood the (counter)intuitive scope behaviour of class members such that ordinary scope rules apply to class members. In particular, a member of a base class is not in the same scope as a member of a derived class.[1]

In C++03 this necessitated a lot of boiler plate code to lift up the base class constructors but in C++11 this lifting of base class constructors into the derived class scope is now easy-peasy with the using keyword. It makes for the effortless building of an exception class hierarchy:

References: 

[1]  Bjarne Stroustrup The C++11 - the new ISO C++ standard - Inherited Constructors