I agree. I got mine from Amazon (ordered on Friday and delivered on Saturday!). I'm using it with my Samsung Note20 Ultra and so far have paired it with a few different IEMs (Sennheiser MX365, KZ-ATE, Mee M6Pro, and Fiio FH1) and just 2 headphones (ATH-M40x, and HD-461).
While I don't find it earth shatteringly better, the Zerda does improve all of them a little bit, especially noticeable with the low end and high volume levels. The 3...