Oh, duh. I thought about that a little while after I made the comment. It still seems like it would be a bit fidgety to set up unless the device itself had two

Oh, duh. I thought about that a little while after I made the comment. It still seems like it would be a bit fidgety to set up unless the device itself had two wireless cards. If you give it the credentials to your home network but give it the wrong passphrase, it will still have to disconnect from your laptop, attempt to connect to the network, fail, and then start its own wifi network back up to tell you that it failed.