This review is for the "coring tool".(updated after using twice). This thing worked fine in my lawn. My lawn is a new lawn in what was previously a no-till Hayfield. Silt loam, and extremely compacted. I have done all of my roughly 3000 sq foot back lawn, TWICE. (First time: It worked best for me if I run a sprinkler for a while, and give it time to soak in, then give it another shot of water so it's very damp on top. Have not had the plugs get stuck in it, has not bent or broken. Any time I find gravel, I just keep moving over until I get out of gravel. No metal tube is going to work right if you're trying to punch holes in gravel. Second time: I watered my lawn thoroughly before aerating the second time. I found that "wetter is better". It was easier, I used less effort, and it went much faster. I leave it in a bucket of water with a few drops of dish soap (to keep the mosquitos out of the water) whenever I leave it sitting for more than a few minutes. The coating on the tubes wears off pretty quickly, and it already has some surface rust on the business end. I'm sure if I clean it well and shoot it with some oil after the last use it should store fine until I need it again. The handle is a bit more flexible on this than on the tool with the 4 solid spikes. I don't know why they did that. I find that if I stomp it in, then rock it a little back and forth and/or side to side, I can get it to sink all the way into the soil mist of the time, and pull out nice neat cores. It is quite a work out. Don't expect to do too much each day, trust me. If your soil is heavily compacted. Water the crap out of it, the tool works better with wet soil. My lawn was so wet in spots when I did it the second time that I could occasionally punch full-length holes by simply leaning on the tool.