The coils on the bottom of the Roost extend its range, and they don't rest on the ground, like the otherwise-impressive. Since the coils are slightly suspended, the detector won't set off a false alarm when placed in a drip pan, or on a similarly conductive surface.
The Roost's biggest feature is its Wi-Fi connection. Sensors without a Wi-Fi connection, such as SmartThings and Wink, require a smart hub, which is a barrier to entry for many people. The two best sensors that do connect directly to your phone via Wi-Fi are both solid products, but they're more expensive -- thecosts $60, and the clocks in at $80.
Between an easy setup, a solid set of features, and Wi-Fi connection, the Roost seems like the best option on the market right now. But a few drawbacks keep it from total domination. First, it doesn't work with any major smart home platforms, such asor . This isn't the end of the world but it does mean you'll need to download another app, which is kind of annoying to keep on your phone for a passive monitoring device.
The second big drawback is that the Roost isn't waterproof. While the detector isn't a, it certainly lets water in through the alarm's top speaker holes. A few drops of water splashed on these holes while I was testing the Roost and the alarm kept going off for nearly an hour -- even after I'd removed it from the water. More worryingly, the Roost sensor won't survive being submerged. So it's a one-shot deal in the case of serious flooding.
Despite its weaknesses, the Roost's strong design and feature-rich interface -- all for a comparably low price -- make it one of the most appealing devices on the market. If you don't already own a smart home hub, then the Roost and the D-Link should be the top two contenders for your flood sensor of choice.