I'm loving this stand. I'm using it for my 27" viewsonic gaming monitor, and have also successfully mounted my 34" Xiaomi ultrawide safely on it too. The upgraded 9kg weight rating is a huge benefit.
I had an older F100 North Bayou mount (which wasn't as good - it couldn't properly support the weight of the monitor), and I was able to re-use the USB cables in the base in this new arm. The only thing missing is a cable management duct on the back of the metal mounting bracket itself to direct the cables down. But I'm really happy with the result. Highly recommended.