The bundle presently on sale at Just-Mobile's site is the previous version: Xtand Go (3rd gen with C-bracket for naked iPhone 4 only), and Highway with only one USB port rated at 1A. The on-sale bundle is listing at $59.99, on sale for 40% off, or $36.
The Massdrop bundle is 4th gen Xtand Go with universal bracket for any non-Apple smartphones as well, with or without a case. Also the Highway Max is with 2-port, each rated at 2.1A. You need 2.1A to charge iPads and tablets. The Massdrop bundle is listing at $64.90, bundle price at $39.99 (38% off). Massdrop bundle is equivalent in pricing but a newer version and better value.
LouisThomasYes, 2.8" max. width is the width of the cradle fully opened. According to specs, Galaxy s3 is 2.78" wide, which should fit the 2.8" cradle. But in case it doesn't, you can still use the "Go Button" solution mentioned below.
The Massdrop bundle is 4th gen Xtand Go with universal bracket for any non-Apple smartphones as well, with or without a case. Also the Highway Max is with 2-port, each rated at 2.1A. You need 2.1A to charge iPads and tablets. The Massdrop bundle is listing at $64.90, bundle price at $39.99 (38% off). Massdrop bundle is equivalent in pricing but a newer version and better value.