Without knowing what you like in the "look" may make my views a bit out of line?
From a strength view, it is plenty strong. Possibly too strong but then you may have designed it to look strong. Much better too strong than the other way!
Are you leaving it open or putting a skin on it? For making a skin a bit easier, I might look at moving the front two uprights on left and right in under the top ring of boards so the front is all one level. This would leave the weight still resting on solid wood from top to bottom as you have it now. I like adding a skin as it makes a good place to hide things.
Not a bad design at all. From there much depends on what you like. Far more than what we may like.