There are various reviews in other threads. It doesn't seem to be highly recommended. I bought an iGrill2 when it popped up on an Amazon Daily Deal for a great price. I've used it for 3 or 4 smokes. I've been happy with it so far. Range could be better but it's bluetooth, it is what it is.
The iGrill doesn't use WiFi, it's bluetooth only. You can't monitor it from an internet connection. Check out the heatermeter open source project for that functionality.