I considered the moon shade awning for a hot minute, then stumbled on and wound up purchasing the Kelty Backroads instead.
The Kelty is similar in some regards (arched design, temporary attachment) and differs in other ways (fabric goes to the ground without separate upright poles, attachment to vehicle is via straps).
Note that’s not mine, just an image off of Amazon.
I have a 4Runner, Sequoia and FJ60 (plus a Ben-Hur trailer converted to base camp use) that might be called on for duty depending on the nature of an excursion, so the temporary sort of awning is far better than a fixed mount unit for me.
Downsides to the Kelty are also upsides in some situations, mainly that it has more side coverage and isn’t as “open” to the elements. This is a downside when you only want overhead coverage but a benefit when you want protection from wind, rain, snow or weirdos watching you change your clothes. The sides roll up somewhat, and there’s a big door of sorts, so it can be pretty open but not as much as a strictly overhead awning. Go look at pics online if you want to see how it can be setup.
At around half the cost ($185 vs $395), and with the increased side coverage it hit the mark for me. I’ve used it to cover my camp kitchen, picnic table, mountain bikes and other gear while away from camp, as general sunshade, as a changing room and even for overflow sleeping space (I’d happily sleep under it unless the bugs are pretty bad).
It also occurred to me that it doesn’t always have to attach to a car. I’ve rigged it to a tree or other structure, too just to cover some gear off to the side and out of the elements.
Here’s a pic of the “door” side when I had it setup over the glamp kitchen last year. It’s not as open as the moon shade or other awning, but again, that’s good or bad depending on the use case.
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The door bottom is a trip hazard, as are guy wires on others, so maybe that’s a wash(?)
Let me know if you have any questions.