Recently I brought TP-Link TL-WN823N wireless USB adapter to connect my Raspberry Pi over wireless network. Mine is Raspberry Pi 2 Model B, so not having built in wireless capability. I chose TP-Link TL-WN823N over Edimax EW-7811Un because of its 300 Mbps speed, both were available on amazon.in with similar price.
It did not get detected out of box when plugged into my laptop running Ubuntu 16.04. The driver available at TP-Link website could not be installed because it was for older version of kernel. However, I could easily find driver over Googling and it worked fine.