The good things:

• It really is an advantage over normal USB, that I don't have to trun the plug three times while trying to connect it, as it can be plugged in either way.
• I find the extra protection also cool, so in case you accidentally try to plug in something you are not supposed to, it just simply won't work instead of, I don't know, supplying too high voltage or something.

So far it caused a lot of headaches though:

• Way too often I found myself in a situation, where I couldn't use some devices, because I didn't have the necessary adapter. This issue should be temporary though, so I'm not complaining.
• Some cables are not compatible with some devices, and it can be really confusing. Before I knew this, I was certain that a monitor and a laptop of mine weren't compatible for a long time, until someday I read about this and tried it again with a different cable.
• In most cases this is not an issue, but rarely I find that the USB type-c plug is not as robust as a micro USB for example. On my girlfriend's Samsung S8 it always slipped out, so the contact was terrible, while a micro USB plug does have some clamps to properly attach. Again, in most cases the type-c plug is clicking in properly, so it's not an acute problem.