Not that I can recall. I wasn't trying to imply that TP-Link was subpar, but rather that I trust Ubiquiti's equipment based on recent experience. TP-Link could be just as good, and it is also possible that only the models of Ubiquiti that I happened to test were the only hardened models.

You can do a basic test by connecting one computer the secured network, and one computer to the guest network and attempt to ping the 'secure computer' form the guest. If you're able to ping successfully, it isn't fully separated. It isn't a thorough test, and just because a ping fails doesn't mean it is truly separated, but it is a great place to start. Most cheaper equipment fails this test out of the box. Most all of it can be reconfigured to be locked down tighter, but that can be beyond the expertise of their target consumers.