They work quickly, professionally, and courteously.
One item of my order didn’t work properly, i wrote to the customer service of Ulanzi about this. They replied almost immediately. Of course, I had to send them a video. After that, they gave me advice on how to fix the issue. I tried it, but unfortunately, it didn't work. So, that same day, they sent me a replacement for the item. They work quickly, professionally, and courteously.