I picked up an iGrill (came with 2 meat probes) on Black Friday for $90 + tax. Once I got it home, I read the instructions (located in the free app, then paired it with my iPhone. I also took a moment to check it's accuracy in boiling water, and found it to be within a few degrees of my candy/frying thermometer.
I had planned to cook a Boston butt over a turkey in my 18.5" WSM, so I ran the probes/wires to try out the iGrill, with a probe for each meat. I also ran my 2 Maverick ET-72s, to compare performance.
I found the iGrill app is a better choice for me, over the iGrill Classic app, as it's dark background makes for better visibility during quick views. It also takes up much less memory, as the Classic app is 20+ MB.
I was impressed with it's range, as I carried my iPhone all over the house, and into the front yard (about 45 feet away). I really like the graph feature, that allows you to track temperatures over the duration ofthe cook. I've yet to try the data export feature.
My only real problem was an app crash, buy I chalk that up to having another memory-hungry music streaming app running at the same time.
I'm interested to see how the "ambient temperature," or pit, probe works. I'll likely order one in the next month or so.