The Swarm Tile looks easily integratable into PCB designs. And, it's very low power. Although, I wonder why they need about 3 Watts power consumption when transmitting. At their low transmit frequencies (148-150 MHz), I would think they could lower that number to less than 1 Watt since the wavelengths are so long. But hey, if you deploy your sensor in a sunny location with solar panels, then why not?