Summary: Well the honeymoon is over. Initially loved this product, but 2 weeks of constant dropped connection and lockouts. They work great with a daily reboot, but that should be the job of the firmware, not user intervention. I get the same on both the WPA271 & WPA281. TP needs to resolve this. My recommendation is don't buy till you see a firmware fix.
Summary: Set this up at around 8pm the night before with a TP-LINK TL-PA211 as the corresponding powerline device at the existing wired router. Was easy to setup, contrary to the experience of some other users. Got it configured easily and Internet worked great. However, when I woke up the next morning at about 7, the WLAN connection to the TP-LINK TL-WPA281 was strong, but no packets were being sent to or received from the Internet.
Summary: Pardon mon français; je ne suis pas francophone. J'attends toujours que l'extenseur fonctionne. J'ai essaye en plusieurs endroits, sans fil et avec fil, et avec plusieurs ordinateurs. Les lumières s'allument, mais pas de connexion. Je suis très déçu.