Another reason to use the TL-WA701ND was the possibility to operate it as a bridge.
Unfortunately, this feature is implemented so that it is not usable in practice. The TL-WA701ND supports neither AP nor as a client WDS. So that connect two LANs does not make sense doable.
Only through the use of OpenWrt I could both TL-WA701ND to really bring as a bridge between two LAN segments to work.
Conclusion: Ordinary hardware with absolutely inadequate software.