One of the many repeating themes on the Arduino forums is the use of Strings (with a capital ‘S’) against usings strings (with a little ‘s’) – the former refers to a class that encapsulates string handling and the latter refers to the use of nul terminated char arrays.
The kind of forum threads involved are generally someone who wants to use Strings and is having a problem followed by a lot of other posts telling them not to because they are ‘bad’.
So what makes them ‘bad’ and is this really a problem?
Arduino++ 