The best thing going for the 530 is Nokia's penchant for well-designed phones, with TrustedReviews saying it "looks better" than other low cost devices. While the plastic body lends itself to being more durable than some of its metal counterparts, CNET points out it that it also means it has a "slippery body" that turns you into a "butterfingers." On the back side is a five megapixel camera that TechRadar says "might capture some nice photos" in ideal conditions as long as you keep absolutely still. Given this requirement and Pocket-Lint's finding the low-light "noisy with lots of mottling" it's probably in your best interest to avoid the 530 if you need a phone for taking pictures on the town.
For the price of the Lumia 530 it could be a lot worse than it actually is, but even with its average battery life and display it's still a decent buy for under $100. If you're in a pinch or really don't care about having the latest and great and just need a dirt-cheap, functional smartphone then give it a look. But in the long run, you've be better off saving the cash and splurging on the significantly better, but still cheap, Moto G.