The only 2 things anybody could say bad about this are that it's hard to clean (trust me I know how to clean stuff, alcohol, salt, all that I know) and the bowl appears to be medium small, but it's just flat out small once you start filling it; 1 hitter.

Now for the good: I don't know how much smoother it makes the hit (hard to tell), but it definitely will keep your bong clean. And obviously it fits the bill for why we all bought it: 90 degree joint, such as The Nautilus.

So in closing I'd say that unless you can find something similar to this that's easier to clean, for under $50, then ya get this. I'm thinking the blue/green "4 way" Weed Star one would be a good competitor to this if you want to look around.

Oh and I forgot, this is superior to the Black Leaf Cool B due to the arms being longer.

I have use it a few times and like it alot .....way better than the Black Leaf version cuz there is no drag and designed better (the 2 diffusers are further apart allowing more water to be used ) nice sized push bowl and very sturdy and well made thanks Ziggi!

I love this thing, but I found the chamber beneath the push, right around the bowl-hole, is a bit difficult to clean, but if you get creative with a pipe-cleaner you can get in there. Obviously this works best in a vertical joint, not as well at a 45-degree angle, but that's great because there aren't enough ash-catchers out there for 90-degree fixed-stem pieces.