I have an older Multico. I may well be wrong, but I sort of think that the Multico was sort of the original "home mortiser". Obviously there were lots of hollow chisel mortisers before, but most were either much more expensive or sort of lame adaptations for a drill press. For my Multico, one could buy sort of inexpensive chisels or fancy "multico" ones, (cost was about $75 or more for one. I had some cheap ones and then finally went for the nice ones. There WAS a big difference. They came properly sharpened, and they stayed that way better. But I would say that there is more to it than a decent chisel. You have to set up the chisel absolutely square to the fence, have to have a good fence and a way to really lock the work down, have to set the bit correctly, etc. I found that it was much easier to set the bit pretty far below the bottom of the chisel. Like at least 1/8” below, (that being the spurs), if not more. All that said, $250 is not a bad price. I think the old multico was closer to $1,000 and I didn’t even get the top of the line model. You might want to buy one of the better chisels and see if it does a better job for you. Pick the size that you think you’ll use a lot. Yes, there is clean up on the sides, but with mine, I have to say it is less than 1 minute worth per mortise in general.