I took some shots while putting together my new Growbox (agardenpatch.com). I'd never heard of an Earthbox when I bought my Growboxes last year - just saw a flyer for the growbox and thought they looked very clever. This year I added a third to my stable, to live on the driveway.
Growboxes are a little cheaper than Earthboxes, and in my climate (CT - riotously fertile temperate, plenty of rain but not too much), I think it's a better design. The more open design collects rain and provides plenty of aeration. You can check water level by just glancing in the opening. Torrential rains simply overflow out of the reservoir. The downside of the open reservoir is that algae grow - hence my adding black trashbag flaps over the openings this year.
In any case, I wanted the three planters to match, and was happy with the first two.
The Growbox includes the mulch plastic and nutrients in the price of the box. The plastic has guide positions drawn on the flip-side, where to place plants. The documentation / instructions are very good, except -
I misread/misunderstood "add up to two cups of lime for tomatoes", and added 2 cups of lime. Spinach and chard really enjoyed this mistake, but the tomatoes got blossom end rot, probably from too much fertilizer / etc. There's dolomite in the nutrient patch, probably plenty of calcium for happy tomatoes. So this year I didn't add any lime.
One Growbox takes about 40 quarts of potting mix. I've been exploring potting mixes. There are a lot of products that sound good, and... don't work so well in practice. Last year I used Miracle Gro Moisture Control in both growboxes. Not good. Didn't wick well, plants gasping for water with reservoir full, because the potting mix was hogging the water. Over the winter I explored several others, including Miracle Gro Organic Choice. Not pleased with them, either. This year, tossed half the contents of the old planters into the dirt garden, and topped all with plain ol' Miracle Gro Potting Mix. That works well. The Growbox instructions say you can reuse the potting mix 3-4 years, without even pulling out the old roots. I'm not entirely convinced that's always a good idea. The tomato trunks had to go. Insect eggs and fungus? I think I'd always prefer to scrape off the top couple inches before replanting, to be on the safe side.
I'd be grateful for any similar pictures of Earthbox innards for comparison. They both seem like great products!