Bought a few NFC tags last Thursday. Works perfectly with my nexus4. Response to the NFC launcher about 2-3cm from tag w the case on. Only detect when in active mode not sleep mode. Try set 2 tasks on 1 tag. It works like an on/off switch, provided u not set too much tasks due to storage. Else u might require separate 1 for on and off. Overall, its a good feature to save some time for lazy ppl like me