To me, Nokia Lumia is one of the best phones I ever owned and ever used.
Amoled HD display is just stunning , it is love at first site.
Dual core processor and 1 gb of Ram with Windows 8.1 is more than enough.
Camera on this phone is really one of the finest out there, beats every 2013 Android phone.
Battery last for 24h (With my usage)
Memory can be a problem, but if u have unlimited or at least 1gb of mobile data,
you can use some of cloud services (free7gb of SkyDrive)
Loudspeaker produce loud and quality sound.
If you buying used phone, meet the seller in person and test the device, pay attention for heating and check battery data.Some Lumia devices suffer from heating and battery drain problem.
For a fair price you got a great device.