Here we have another price drop from gearbest for Mi band 2. It's now for only 18.27 with free delivery.
I have bought two of these from them and 3rd one from Ali express.
Nothing much to say about Xiomi and Mi band 2. Personally I would give 4.5/5.
For more detailed review and reliability of their data, please visit http://m.gadgets.ndtv.com/wearables/reviews/xiaomi-mi-band-2-review-869574