I wouldn't say it was 100% success rate. I would say instead that I still own all the references. I prefer some much more than others so there is still clearly a spectrum of success.
For many of the watches I have bought from new, it has been extremely hard to try them first. Take for example the 5370 or 5650. Getting an opportunity to try and carefully evaluate is not so straightforward. In fact, if I had adopted that approach to the 5650, I would not have one. My old boss taught me in financial markets to shoot first and ask questions later. I think I adopt that approach to an extent with modern watches. Of course, in both scenarios there is an accumulation of knowledge and understanding that becomes instinctive and that helps limit errors. But errors can and will occur.
Let's say, for example, that I bought the 5650 blind and on my wrist really disliked it. What would I do ?