Does anyone have the long termed experience by using E5830 to share wifi signal? Is the quality of wifi signal good or not? Seems like just need one device then, u can receive the wifi through E5830(function of USB wireless and wifi ap) Is it good for people who use outside with less Internet demand, isn't it? Eg. 1) in house, we can have the Internet from modem and wireless ap 2) outside, we can have E5830 to share for IPAD, Iphone, Laptop. I mean we just need one 3G sim card then share for all gadgets! If so, should we pay for IPAD 3G? Just now hoping the Rev. E583x can have longer battery and affordable price! One more thing concern about is the wifi signal sharing for IPAD ... good quality or not? 'Cos sometimes I doubt IPad's wifi. Any ideas?