I obviously date back to the Captivate days. Early adopter then, same with the GS II and GS II Skyrocket (yes, I replaced the 1st, for 4G LTE). Skipped the S III (why bother?) for the S IV.
My first impressions, are WOW! and WOW! Haven't really even had a chance to play with the features, but just the upgrade in power is entertainment enough, at this point. Really looking forward to unlocking the potential of this line, that was so evident back with the Captivate (a phone a year before its time).