I'm not usually a big fan of single-use tools, but this is by far the only tool for this job. We had a party where I needed to core and slice three cases of pineapples, and what could have taken all day took but a few hours. No skill is needed. You just cut off the top of the pineapple and screw down the corer. Once you are at the bottom, pull out the meat and you're done. The pineapple is evenly-sliced and you are left with a usable hull (for serving fruity drinks in, of course). I have seen these on sale for as little as $7.