I have been reading different reviews and I am looking for actual users who may have upgraded from the MAXX (XT912) to the S4. Was it worth it? Were you having issues with MAXX or just want the latest and greatest? Is the battery difference going to make that much of a difference? I have been having slowness issues with my maxx for some time and thought the upgrade from ICS to JB would fix it. I even did a factory reset twice and still slow. I am currently getting just over a days worth on the the maxx 3300 battery. My guess is s4's 2600 would be about the same. Any/all input would be greatly appreciated!