We used three 20+ footers for two years............

Did just an excellent job of seedbed prep, plus it ground up every weed in sight.........so gave us several days of weed control beyond planting.

However.......when we started getting so much rain in the spring a few years ago, we found the crumbled surface packed like concrete........which we could overcome with enough rotary hoeing, as long as we could get in timely--------- but could not always do that due to additional rains.

So, crapped-can the use..........still have them in "the weeds".