Spent most of my day to deal with iTune

Realizing that my New iPad started running out of space, I decided that it's time to sync up Apps with iTune.  Here's the problem: when you sync up your iPad with your iTune, you will be asked that have your iPad's Apps all wiped and let iTune repopulate your apps from iTune.  I think this is totally bullshit, particular in this post=PC era.  There should be an option to to exactly the opposite: allow me to wipe the setting on iTune (only for apps, and only for that particular iOS device) and populate it using content in my iPad.  But since Apple is stupid on this issue, I have to work around it. 

So first I right click on my device on iTune, and then choose "Transfer Purchase", that will make sure that iTune has all the apps that I have on my iPad.  This is critical, because if I don't do that, when iTune found that it doesn't have the apps I have on my iPad, it will REMOVE those apps on my iPad and ... here is the important part ... ALSO REMOVE DATA FOR THAT APP.  I can redownload the app, but hell nowhere I can redownload those data.  So make sure your do the "Transfer Purchase" step.

Next I did a Backup in order something goes wrong.  Again, this is mainly for backing up data associate with my apps.   Other than that, the backup doesn't do me much else, cause if you do the app sync, and then do the backup restore, you will roll back to before as if NO app sync was happened.  At first I was thinking of using the restore to "restore" my folder setting on Home Screens.  Well, it didn't work.

After the backup, I did the App sync.  And then the painful part:  putting all apps in the right folder because iTune will  NOT Preserve your folder setting.  Yes, this is so ultra stupid.  There is a reason why so many people hate iTunes.

Speaking of hating iTunes, I found that wireless sync is so unreliable.  I can spent tons of time organizing apps on iTunes, but when I then do a wireless sync, it will always fail.  Eventually I found out that the only way make sure that app sync works is use a sync cable.  Once again, stupid.