How well does it work. I mean for 400.00 plus for 10oz it better work great

It "supresses" nutgrass. It does not kill it. I have used it. It does work. What i have is Profine but its the same thing, different name. If you plant a patch of watermelons and a thick stand of nutgrass comes up. You can spray it, it wont hurt the watermelons and itll yellow the nutgrass and hold it back long enough for your watermelons to cover the ground. Ive also used it in a hand sprayer in the garden. That works well too.

Is there anything out there that will actually kill nutgrass

The problem is the tubers. You can kill it with gly but it dont kill the tubers. By the time the new sprout has three leaves, its producing tubers. I used the profine on my little garden spot a couple times when i first started growing a garden there. It was thick with it. Im not really sure if that did it or i just finally cultivated it enough that it went away. Its not there any more.

Matrix(rimsulfron) and Spartan(sulfentrazone) are the best herbicides I’ve found for controlling nutsedge. Only problem is you be limited to using these herbicides around tomatoes.