Wifi backup camera?

[PROSPHOTO]

Anyone using a wifi backup camera? There appear to be a lot of choices, so which ones are good and which should be avoided?

I have my smartphone set up in my dash already as a speedometer(GPS), so if like to just use that instead of an additional monitor somewhere. It's mainly for getting close backing with the spare tire mounted on a Hitchgate.

Thanks

[Jrgunn5150]

I'm using this on my FJ, hooked to my Pioneer headunit, works well.

http://www.amazon.com/dp/B00M979UL2?psc=1