You gonna love it. It is best if you till or loosen your soil first if you have very tough soil like clay or large stones in the soil. The harley will loosen soil but it works much faster to rake the ground with your tooth bucket or run a tiller over it to loosenit up first.
If the site is really out of level use you bucket to rough out the grade. Leave some of the larger holes to bury your debris in or be prepared to haul some off site as you will likely have numerous rocks and roots gather up by the time your done the first pass.
I usually work one direction to windrow large debris, then scrape up the windrow with my bucket and bury or remove. Then make 1 or 2 more passes at 90 degrees to the previous pass to level up the site, filling hole, grinding down humps and pulverising clumps of soil.
I have the Erskine soil conditoner version and it never ceases to amaze me or customers how fast it can turn a mess into a sod or seed ready site.
Ken