$35 for the kit and $25 for the wood... can't ask for more ... I made a step by step video of what to expect, its a very easy build and I cannot recommend this enough. Custom benches for basically nothing. Based on my short use of it, its durable and lightweight, and a great value
https://youtu.be/gmiU7pF7NR4
I didn't like the sand color, so I spray painted it black, over time that may scrape away, but that will give the benches character... besides that, very happy and would buy it again. I purchased 4 of them and made 3 different style of benches... The 6 feet is as stable as the 4 feet, but its all bout the wood too. 2x4 stud is okay, but I would strongly recommend 2x4 pressure treated wood... the only pain is you have to buy the pressure treated wood and let it dry 100% before you paint.... that can take a long time.