I bought the Quarks because the eartips it comes with are exactly the same as the stock ones included with the Moondrop Aria (and probably also the Starfield, LAN, Chu 2, and others). It's a relatively cheap way to harvest some spares.
The IEM itself is quite decent considering the price, though. It has a pleasant tuning that works well for most genres. Detail, clarity, imaging, and soundstage is limited, but still better than cheap earbuds you're likely to find at big box stores. If you're looking for a daily driver, you're better off spending a few dollars more for something like the Chu. But the Quarks made for a good "disposable" pair of IEMs that you don't have to worry about losing or damaging.