Yup, QList, QVector, QString. There are a lot of reimplementations. I tend to find them a lot easier to use than the C++ counterparts. What type of problems were you having?
Nothing impossible -- just integration with the standard library algorithms and some older source code I don't want to modify. It's less difficulty and more a matter of laziness.
I agree. QList is great, it's got very straightforward methods and it's more than fast enough.