Wireless meat thermometer

I have the Igrill 2 and the mini. Works for me. Will let you try them if you want

Don't know. Haven't had to change it yet

I don't know what the range of the igrill Bluetooth but take into consideration. I have a maverick 732. Battery life has been good for me. No experience with 733

733 works great and has good range

2 cons:  if your turn the transmitter on before the receiver, they don't pair up correctly some times and it sucks the battery. Turn off is the same.

not the easiest to program the first few times till you get used to it. 

Neither er is a big deal. 

Have igrill. What I like about it most is that it links via Bluetooth to your phone. I don't want to have to carry something else around to monitor a cook.  I do believe maverick is coming out with something similar soon, 735. 

I really like the igrill overall and if had the option to buy all over with the knowledge of experience, I would buy the igrill again in a heartbeat. The ability to prob multiple points on a large cook (turkey) or multiple items (steaks) is a huge value to me. From what I gather the probs are limited with other devices. Also the App is very easy to set up cooks, range temp or just temp alarm. I really think the app puts the product over the top for me.

A downside is that Bluetooth connectivity is stated on their web 150' LoS. I have a glass wall that looks out to the patio where the egg sits so that is easy for me. But if I am upstairs or basement and the Bluetooth is trying to transmit through walls or concrete then that can be a problem. 

Think about where you will be using it and where you will be. My dad was looking into it for his Traeger but I ended up discouraging the igrill because I worried that where he wanted to be would be too far from the cooker to work. Plus having to go through exterior walls of a house or shop limits in distance even further.

I am sure all the devices are good and have their own advantages/disadvantages. Figure out howvyou want to use it, where you use it and how you want to get the information on the cook either by phone or other device. 

Igrill allows for 4 probes. I use 3 for what I am cooking and the 4th is the grate temp probe.