The biggest down-side to the XD-S is that looks like Springfield's not doing their Gear Up program this year.
The Gear Up program used to get you 3 extra Free mags and Mag Pouch if you purchased between Sept and Dec. Considering how difficult it is to find spare mags for new pistols (like we've seen with the Shield), it would have been a nice little guarantee to having spare mags.
Oh well..