I have been using Nrtgear D1500 N300 over an year.
Im getting its coverage even in 30 meters away because of its dual antenaa.
Its very vary litweight and small in size but it functions well.
It havent shown any complaints till now and im using it 24* 7.
This is giving me high speed connection and also wide range of wifi over my 2700 sq ft house.
There is no heating issuefor the modem and installation is also very easy.
And I recomend the modem cum rooter for all