The Igrill works great if you are in a travel trailer and grilling outside your unit, but if your grilling in your garage and want to walk to the other end of your home and watch Telelvision, forget it, it won't happen, I could not be more than 40-50 feet away from my smoker using the Igrill, it has no blue tooth range. Sure, it works great if you have fresh batteries and no obstuctions, but if you put a wall between you and your grill the range is very limited. In summary the igrill eats batteries and it has very little range.
The device works well and the software is really impressive. However, it does not come with an ambient temperature sensor, which is very important for smoking/BBQ. This must be ordered from iGrill, and they will gouge you on the shipping costs ($15 to ship a very light $20 probe). Unfortunately, Apple doesn't sell the ambient probe, or you could buy them together and get FREE shipping.
If an ambient probe is important to you, realize that it will add $35 to the cost of the item. My low rating reflects this shipping expense, rather than the actual quality of the probe, which I think is very good.