We did (wife's 6S, my 6S+), also tested it, and it works great, i.e., I made a voice call via cellular, switched over to Safari browsed around, hit up maps (without WiFi). That's been my only beef with Verizon + iPhone, the inability to do voice + data, and now that's mostly resolved (I guess you do have to be in LTE coverage ...)
It hasn't come up much with me, but on the rare occasion it did, it was a moderate PITA.
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FWIW, it showed up on hers a good bit later after it did mine, her Enable LTE was just an on/off toggle for the first day.