Functionally, I how happy anywhere with this speaker, Bluetooth and NFC works superbly. Also lots of other nice physical inputs and opportunities - very good example that there is optical Toslink.
Cream-wise, they are okay to have on your computer in a small or normal sized room. I had previously Harman / Kardon SoundSticks III, it was actually better cream in them. But, otherwise, run the T4 really over HK at all other levels. They are more user friendly, less / smoother and a little subtly mentioned above, even extremely much more functional and technology wise superior, just such a thing as it also includes a remote control, for example. The design is absolutely nothing wrong with either :)
The sound therefore delivers clearly more than pass - but I feel that I can not give full marks because I know that there are other speakers that deliver better terms cream (SoundSticks, for example). If you pay over 2k for a 2.1 set where you'd actually have one of the best sound available - I guess in this case it is more technique / connections as it put more money and effort into.
Nothing to complain about. Good sound to be computer speakers.
Stable and good system.
Have it in the kitchen. Bit tricky with placement of the base unit.
Bluetooth works superbly with NFC and different sources.
Auto off only via Toslink.