Hi Robert, This is some comments based on reading the tutorial. I think your explanations are fine, but I would like to see some remarks added: eg class gps_position { public: int degrees; int minutes; float seconds; gps_position(){}; gps_position(int d, int m, float s) : degrees(d), minutes(m), seconds(s) {} }; I think it should be stated that this is not recommended practice, ie, this class has a non-trivial invariant and should not have public members. A better example might be to use std::pair. The examples use pointers in arrays and pointers in standard containers. I think the text should state that this is not recommended; or even better, throw in a shared_ptr instead. The code in the example is inherently exception unsafe. Therefore I also think that container< shared_ptr<T> > should be supported by default whereas container< T* > is, well, ok if you don't have exceptions somehow. br Thorsten