I was originally going to make my own beds out of untreated rough cut lumber (oak and ash) that I have laying around, but after researching I'd have to do that every 6-8 years...and the thought of tearing down the internal guts of my greenhouse just to start all over again was daunting, so I went with these. I am really glad I did! Not only did it save me a ton of time building and hauling heavy wood boxes around, but they will last 3-4 times longer.
Even if you are not handy at putting things together, this will be a breeze...but be prepared to take some time to get it done. It takes about an hour to peel the plastic protective sheets off the panels and then assemble it. I did the configuration of 4 side panels together, for an 8' long bed...but then realized I didn't account for the middle support post of my little greenhouse and this was too long. It was easy enough to undo the bolts and take off a side panel on each side, then reattach the end pieces. Since I bought two of these, and now have 4 extra side panels I went to the benehorti website and purchased the round 17" tall bed (basically just 4 corner pieces) and will add my side panels to that to make a 4.5' bed to add to my two 6' beds. Each 6' bed holds about .75 cu yards (yards, not feet!) of soil - so be prepared to buy a lot of bagged dirt (expensive!) or have some trucked in...either way it's a lot of lifting and dumping, or shoveling. In my opinion...well worth the effort.
I ordered these on a Tuesday and had them sitting on my front porch on Friday...fast shipping and an easy solution to my needs - it was everything I was looking for. I'd recommend these. You don't even have to have your own tools. They supply the little wrench, and even though the pics show you needing a screwdriver, you don't really. You can, but it's not necessary. I had one out but didn't use it. The bolt heads bump up against the inverted curve of the metal exterior and that provides enough resistance to just use the little wrench provided to tighten them down nicely.
Can't wait to get my round bed so I can get the last one put together and get to planting!