What is the best iPhone 4 spy software ?

Does anyone have any recommendations for iPhone 4 spy software
To monitor wife activites ? Any reviews of actual software users ?

Has to be someone who is experimented with some of the iPhone spy software

mobile me for i phone works very well and its not spy wear u can also lock your stolen phone and send messages to it .
i find it ver acurate even to which side of the road u r on

Does it allow you to see text messages. Not just when it was sent
But the actual body of the text ? Does it operate in complete stealth
When u put it on there phone

no just allows u to seee there location only u dont need to install it just gogle mobile me and sign in

i really need something that allows me to read text messages