The Ali pieces are quite horrible. Wrong case shapes, cheap movements ... But some of the dials are pretty, not necessarily close to gen, but still nice looking. The problem is though that some Ali merchants ask up to $300, as if they are higher tier reps. In reality, that's approximately $270 too much.
The lack of high end GS reps has two main reasons: No. 1 the GS finishing is next level, not comparable with an Omega or Rolex. That still doesn't mean that better reps than those Ali pieces are not possible. But then there's reason No. 2, which I think is the main reason: The demand for GS in markets that dictate rep availability (for example: Shanghai, HK or Singapore etc.) is still relatively low. This is slowly changing, so better reps could be on the horizon. But it will be a tough nut for the factories to crack. Not necessarily because of the Spring Drive, GS has Quartz and Automatics too, but simply due to the GS build quality being on a very high level and thus harder to convincingly replicate....