Received the Otter + Pop Symmetry case for my XS, yesterday. So far so good. It seems to have a slightly smaller footprint than the normal Symmetry; specifically in width, side to side. The PopSocket does not sit flush, as some of their early advertising stated, but it still works with all my wireless charging pucks and stands, with the Pop Grip still on, even my iOttie car mount. The only charger is does not work with is my Scosche QI charger that is a removable power bank.
The convex back (to accommodate) the Pop Top actually feels pretty good in my hand. Naturally, there is not as much room for your fingers between the case and the extended Pop Grip, so that takes a little getting used to.
Speaker cut-outs are symmetrical, as the case is designed for X & XS.
I have mostly decided that this is a much better solution than installing a PopSocket on the back of a regular Symmetry case.
Be glad to answer any questions...