See the top 4 lessons I learned when working with concrete. I made a concrete table top and learned what NOT to do along the way. Watch this video to see the concrete top table I made and the things (Table Top Design)
Good idea if you have rock solid ground that is hard to dig up. If you don't cover the holes you can use them for herbs & annuals. also lined with weed barrier cloth & used rebar in several places for stability. It makes maintenence super easy.