I have a desktop lamp connected in one of the USB ports but just to annoy me the screen delivers power to the USB ports even when the computer is off so the lamp is on 24/7. Why, oh why.
Other than that the screen works great with my 15". The first time I connected it I got a lot of beach balls just trying to click things but after the first reboot it has been working just fine. The only thing (besides the USB power) would be that the cable that came with the screen is very touch sensitive. If I so much as touch the cable it loses connection for a second or so before the screen comes back.
I had a similar experience with the cable when I tried to connect the LG 4K. It seemed like a very loose connection.
It didn't feel solid like an older USB connection. It feels loose like when I plug in a HDMI cable.