We can talk about them, but , just know that most of the people posting their responses are pretty much correct.
When it arrives, just know that you're getting what you're paying for.
50w to 500w? there's a ton of difference.
Do a little searching here about Air-X and Missouri Solar & Wind (pretty much the same thing) ; read through them. Those will give you a good background of what to expect.
In my early days of being a MOD, we allowed MS&W to have a voice here. All they ever did was try to make excuses. Eventually they dropped off and just kept selling .
IF you're buying one to get experience with 'mills , then those are a perfect way to go.
Above all else, give it a good going over before you put it up on a tower (mainly for safety reasons!!)
Cheers
Bruce S