This was my first ever harness, and although it came in a pretty pink, and was reasonably priced at just £20.00, my mummy didn't like me in it at all.
Firstly, the chest plate seemed so rigid on my chest that I always looked uncomfortable, and it seemed to slide around when I moved. Then I escaped it pretty quickly, even though it had been adjusted so there wasn't much room to wriggle.
One thing I liked was that it didn't have to slide over my head because there were clips both on the neck and the chest straps. I've got used to harnesses going over my head now, but I didn't used to like them initially!