The good: it started right up with the appropriate 25:1 oil/gas mix. Typically between 1-3 pulls. Does technically drive posts, within reason.

The not as good: I was really only able to use this reliably on T-posts with some modification. The guide they provide is too short to keep it straight on so it insteads bounces on the post. I was able to have an extension welded on with some 2" pipe scrap. It helps both with the aim and the weight of the unit and made quick work of the 34 posts I had left to drive.
I think if they offered an extension as part of the package this would be 5 stars, especially given how cheap it is.

Be sure to double check all the bolts after the first hour. A couple loosened up, but its par for vibratory tools.

Packaging leaves some to be desired however mine showed up intact. Started on the second pull and performed better than I honestly expected.
Works great for t-posts but doesn't like to drive 2-3/8 pipe. Goes about a foot in and stops. May work on soggy ground.

Must be able to lift 40lbs over your head if you are short as me but that's worth not having to pound them in by hand.

Unsure of longevity just yet.
10/10 would buy again. Low rating due to the inability to drive pipe. (Not that I expected it to)

Under $200 for this one, and a big-box-store unit of the same size is $550.

I bought this knowing it's an imported Chinese Special. Seems lots of reviewers don't appreciate that for this sort of thing, you are Quality Control. If it works for the first hour, it'll probably continue to work for a while. I knew "broke instantly" was a possibility, with return/replacement being the remedy until you get one that works.

I plan to use this a LOT in the return window. If it makes it that long, it will have been worth it. With temps around 100F and nearly 100% humidity, this will be a lifesaver.

In soft ground, it zips right through. It is *very* slow going through roots, but it'll do it. Better than me beating up my body to get through a root or hard soil. My 5'6" girlfriend can also use it and she might never get through a root on her own with a manual driver.

Gas mixing bottle is a nice touch. It wants 25:1, my Husq weed whacker is 25:1 too. Added too much oil and it's a tad smokey, not an issue when it's hot and running.

It's small and lightly powered, but you know that going in - it's also fairly light and easy to handle. It's a Harbor Freight-grade import, but you know that going in too. All in all, with only 20 minutes under my belt, I'd recommend this product. I'm not upset about anything with it.

Will update this review if anything changes - July 10, 2023.

This is a great Driver saves a lot of time well worth the money

Thankfully, I haven't had to use the item yet, but it seems well-built and sturdy and I can't wait till I need it