The EarthBbox is a tremendous product. We have had several of them for years and are always pleased with our vegetable yields.
Although the initial start-up costs are high, if one keeps the boxes for say 10 years, the cost/year is minimal, compared to the yields achieved.
Previously we had a very large garden, and it took many hours to prepare, plant, feed, water, and maintain, but with the Earth-boxes, it is quick and easy. Once planted, all you need to do is water the box daily and you're done!
I will recommend that you follow the enclosed directions carefully. Do not deviate from them. I did, and...