According to Baymard (source), Quick Views are a bad idea:


They recommend:

  1. Avoid Quick Views altogether
  2. On desktop, have secondary hover thumbnails
  3. Make thumbnails big enough
  4. Include vital product information as attributes


One exception is for sites that need to display a full-screen version of the product thumbnail easily.


Update (2020-07-26)

They recently published some more research on Quick Views (source), especially on mobile. They’re still a bad idea and only a partial fix for an underlying problem.

The lack of a clear “product page CTA button” is one of the major and common issues with the Quick Views.