Any recommendations on raised beds for gardening?

Image by the.sprouts
It was a lot of fun (and so fast!) to build these beds with Green City Growers [1]

[1] growmycitygreen.com

Question by slscville: Any recommendations on raised beds for gardening?
I’d like to install a raised bed for vegetable gardening this year. I think this will allow me more control over the soil quality. What’s the cheapest and easiest way to go about it? Should I buy one of the ready-made beds available online?
In case I wasn’t clear, the soil is not my concern, it’s the actual bed itself. Should I try to build one, or buy one that snaps together?

Feel free to answer in the comment section below