Well it's been many, many years since I've used it, which was back in the late 80s and early 90s. My impression from this time is that C++ is unquestionably a work of genius, but that I didn't particularly like it. Part of that is that we didn't really know how to use it effectively. In that era most object oriented programmers used concrete inheritance way too much. Part of that is due to aspects of what we thought an OO language should have that turned out to add complexity while being only marginally useful in practice (e.g. multiple concrete inheritance and operator overloading).
But in terms of meeting its design goals C++ is a tour de force of ingenuity -- even if some of those goals are questionable by today's standards. The very fact that we know some of those features aren't necessarily ideal is because they were taken out of the realm of academic noodling and put into a practical and highly successful language that could tackle the problems of the day on the hardware of the day. It's hard to overstate the practical impact of C++ on the advancement of both theory and practice of software development.
Any prize for contributions to OO programming pretty that didn't include Stroustrup in its first recipients would be dubious.