Maybe I should expand on the technical details on the iGrill(2) issues..... It's purely a Bluetooth communications issue. The device itself & the associated smartphone application seemed to work just fine.
The device uses Bluetooth 4.0/LE. This is a low power system, and pretty obviously done to extend battery life. Unfortunately, while the device is advertised as having something like a 100-150' range, that's only under the absolute best of circumstances, i.e. nothing but clear air between devices and no other RF interference. In practice, I could only maintain a connection from the iGrill(2) base at the grill to my phone or table in the house with line of sight , meaning directly through glass. As soon as a wall was introduced between them, the Bluetooth connection failed within seconds.
This is an issue with anything that uses Bluetooth 4.0/LE communications.