Until I noticed this on Eciggity’s website for $4.00, I had never heard of the Yun 25mm. I bought it on impulse because the price was right. This is an old RDA (2016), and I love picking up retro hardware. When it arrived, I immediately realized that if you leave the center airflow closed off, you would have true Kennedy style airflow. I threw a build in it, and was quite impressed with the flavor and cloud production (even with the closed center post). So then I did the next logical thing. I got out my Kennedy 25mm and put the exact same build in it and used the same e-liquid. Granted, the Kennedy did have better flavor, but the Yun wasn’t too far off. It really is a good RDA. I also tried the two other center airflow posts that increased the airflow - you get bigger clouds, but the flavor suffers greatly (just leave those two in the box). I should also mention that there is no Squonk pin, but you can’t fault them for that as squonking wasn’t really a thing in 2016. This is a big dripper and can handle some pretty beefy coils. If you’re looking for a big, beefy, throwback RDA that delivers flavors and big clouds on the cheap, you should grab one of these while they last!