When I had that crummy facemill (very similar visually to the one you linked) the inserts worked well. You can also get a bunch of other tooling that take the apmt inserts and keep your tooling somewhat universal. Then you don't have 10 different inserts kicking around like I do. Lol.
I am super weary about the cheap facemills now tho. Two of them having the same issues. The prices are tantalizing... Its also difficult to figure out if the runout is in the insert seats or the arbor or the facemill itself. And there's no adjusting anything. I hope yours turns out well.
One major thing the facemill trip also showed me was axial play in my spindle. That was murder... Chattering all over the place. I tightened it up but still have a thou or so of play. At some point I'll pull the spindle out again and tighten the lock nut more.