This is not at all a "really good Android phone". It's a great phone for its price but it comes nowhere near high end Android phones. It's largely equivalent to a Motorola Moto E (in price and specs)[1]. Ultra cheap Android phones for developing markets is a new class of phone and cheap but relatively powerful SoC like the Qualcomm 200 (used by both) are new as well so there isn't much competition here yet.

It's a good phone when you consider the price but let's not exaggerate the fact that its killer feature is its price, not its specs.

1. http://www.gsmarena.com/compare.php3?idPhone1=6323&idPhone2=...