It's my first time using a KZ wireless and I'm glad to have gotten it.
The KZ VXS seems to have a V-shape sound with more bass emphasis. Male and female vocals may sound slightly "grainy" on certain older tracks but fine for modern ones. I like to listen to upbeat and pop songs with it.
Sound quality is actually better than expected and almost as good as a few $150-200 wireless earphones from other brands that I own from 2-3 years ago.
The earphones are comfortable to wear and they fit like glove.
First charge was 1.5-2 hours, and I think the battery life can last for at least 4 hours during usage. Having used them for almost 2 hours, the battery % shown on my phone was 50-60%.
Though there's a feature for gaming, I have yet to try that. It sounds fine just the way it is. There's no lag and the connection is good.
Microphone is fine too. I called a friend and it worked.
I'd recommend this to anyone who's looking for a wireless IEM with a budget of $50-60. KZ models usually have discounts during sales.