This is in the city where multiple WiFi networks surround. I have picked the most quiet channel and have swapped to a different brand / model (Cisco SRP527 --> TP Link TL-WA901ND).
Using mixed mode N+G+B, WPA2 AES+TKIP.
Any suggestions? Is this just overcrowding from neighbours? Can a WiFi router only be expected to support say 5 users?