I purchased this item several months ago. Unfortunately pineapples remained expensive for awhile, so I found other uses for it until I found a sale!
Among the other uses I found for this tool: it's great for melon. The curved blade very neatly cuts chunks of canteloupe away from the rind with little to no waste, and you can easily scoop chunks out of your watermelon half and cut them into smaller chunks.
However, today was the fateful day that I had my first pineapple to try it out on. I was excited to give it a go. It wasn't a very ripe pineapple, apparently a bit harder than this was designed for. With the very first cut, it broke. I had even removed the peel first, forgetting that this tool is supposed to do that as well.
Even if the pineapple were very ripe, I don't think that it would have gotten through the skin without failure. So, I'd recommend it for softer fruits like melons, but I don't think it can handle something hard like pineapple core/skin.