Please verify a couple of things to help diagnose the issue :
1) When the Almond 2015 disconnects check the status (Home>Status) and check if you find a fluctuation between connected & disconnected.
2) What is the distance of the Almond 2015 from your main router? (Success of any range extender would also depend on the fact how consistent the signal is received from the primary source).
Check these details and it might help us to diagnose the root cause of the issue.