I got one from a friend at work cheap about 4 years ago. Added it to my setup.
Its aeroponics, basically a res at the bottom with a pump, pushes water up the center tube into a strainer looking thing. Its a plastic plate with lots of holes in it. The solution/water just runs down through the holes into the next level and the same thing with the holes offset.
They come 5 tiers high for 20 plants and you can buy an extension for 2 more tiers(8 more plants).
Having said all that, I love mine. I also have a home made nft and a few GH Power Grower drips and of course a few in ground every year. The Tower seems slightly faster growing than the others, but not by much. Yield seems to be about the same and that stuff is really more dependent on where I locate it in my backyard.
Ive never used their brand nutes so cant comment on that.
What this is better for is one reason: large amount of plants in a small space. How else can you put 28 plants in a 3 x 3 square in your yard or patio? For some, thats the driving reason. For me, its just kind of cool as another way to grow. It started as a novelty but now Im using it just as much as my home made 20 long nft