I installed iOS 6 Beta 3 on my iPad (3rd Gen) and iPhone 4S, before taking a two week vacation driving around California. Used both as my primary devices and was able to do a significant amount of testing in RW situations. I used the iPad as my primary computer as I left my MBA at home. Absolutely no issues. Battery life was to standard and I was able to access all email and other websites I normally use. Used the Maps app fairly often when I was acting as navigator, more on that below. Had no issues with the iPad crashing or any apps not working. I used my iPhone 4S as normal, calls for work, texting, email, etc. also read a lot on both devices and syncing between iBooks worked with no issues. My big surprise was when I pitted my 4S against my brand new Garmin nüvi® 3590LMT. I got the top end GPS for my girlfriend to use for work and brought it with me for vacation. Worked well when entering an address, but when I was driving and wanted to find something along the way it got very frustrating. Not easy to search for something while driving (not to mention highly unsafe). Hitting LA traffic I got fed up and asked Siri how to get to a certain location. It popped up right away in the maps app and showed me exactly how to get there. I started using both at the same time, then finally just put my Garmin away and went straight with the iPhone. Used it for the last few days and it was just amazing asking "how do I get to Wi Spa?" and automatically getting a route. Got a holder and charger for my car and it was a dream. Zero issues, and the data usage was minimal (total of .105 Gb after a week and a half of normal use plus navigation). The only thing I would add now would be speed limit and your current speed.