I have a >200MB/s fibre link to my house but was struggling with wifi coverage in our small office at the back end of the house (not a big house).

Without the link a speed check showed ~20MB/s with the existing wifi so purchased the above thinking it would improve the situation. Setting up was very easy and followed all teh instructions. The LED display on t he extended shows 3 bars when plugged into the office but has not improved the wifi speed by any measurable amount?

Any ideas or was it just a bad purchase? Have tried moving the unit to different spots in the top floor but not any better.