I have the iGrill2 and like it. It can handle up to 4 probes and works with an iPhone/iPad app over bluetooth. You can view the temps in a time-stamped line graph over the entire length of your cook. It's very helpful for overnight cooks -- you can see exactly where the pit and meat temps were at any given time. The graph also shows a big blip when you open the lid, so it's easy to check the last time you mopped or spritzed. I used to keep a note pad to record temps during a cook, but don't need to do that anymore.
My biggest complaint with the Mav 733 is the battery life. It sucks.
This thread is 2 years old!
Wow. I've had to change my receiver batteries almost every cook. I think I did two cooks with one set one time.
Yes, syncing is a bit of a pain.
I've got the iGrill2. My only bone to pick with it is if you lose blue tooth in the middle of the night it doesn't seem to do anything and you might miss an important temp.