Well, I've occasionally had to squint at the micro USB in order to get it inserted properly (since I'm not always wearing my reading glasses), but I've never broken one even when trying to ram it in the wrong way. And if charging speed differs, well, that might be an advantage for some people, but not for me. If the light (or computer, or whatever) is on the low side of a full charge, I just plug it in and then unplug it the next day.

I'm still wondering if there is something else that I'm missing.