I have a Lumia 521 on MetroPCS with the Amber update and WP8 GDR3. There is a saying: There are rarely bad products, just products priced poorly. The Lumia 521 is absolutely an entry level phone hardware wise, but at $30, with no contract, dual core @ 1 Ghz, and internal memory of 8GB (bigger than many other offerings even at $180) and a silky smooth OS that is tightly integrated and very functional, it is a FANTASTIC product. I hope 8.1 makes it onto my Lumia 521. I have been very pleased with WP8. And the app gap is not nearly as bad as it once was. Even with the paltry hardware, since I can't justify spending $600 on an LG G2 or an iPhone, there is no Android device I can get (no contract) for under $100 that is anywhere close to my Lumia.I wish Nokia/Microsoft would break their deal with AT&T Exclusivity and just sell unlocked phones in the mid-tier, like the 820, 720 and 620 in the USA. It is too hard to find them from reputable sources.