Generally good, iPhones and iPads have their problems

The port is attached to the iMac is fast and works with all USB sticks and drives that I could test so far, properly. Only the iPhones and iPads that I wanted to sync via iTunes, did not accept the port. There was no error message, it was simply no device in iTunes appears. But now is not so bad, since one anyway hardly need to synchronize with iTunes. For the "flying USB Stick removable" good for the port perfectly.