I've got one too....it is AWESOME and will surprise you!
I've got one too.
I was reluctant to post about it because I still run stock exhaust (waiting on a SS Akrapovic w/ a long carbon pipe to go on the forums at a decent price...HINT-HINT) and stock air filter (I'll be getting the MWR filter next).
However, in that respect I can tell you that you don't need any mods to feel the improvement this unit makes. I have the race version and from the moment you pull away after the install you will notice the change...and it's a big change.
It gives the bike a kick in the pants that you may not have realized it could have, as the bike is very well engineered and tuned from factory.
Here's one of the examples I can give.
When I had the rapid bike installed, I also had Sato rear sets installed and went GP shift from standard for the first time. So in the process of enjoying the Rapid Bike, I was also learning to shift efficiently in GP mode....so there were shifting errors.
On the first Sunday ride after a quick readjust of the rear sets I began to settle in...coming into a corner that would normally be a downshift from 3rd to 2nd, I went to 4th out of habit w/ no real time to fix the error, I went for it and just cranked it. The rapid bike module delivers so much more low end umpph that she never bogged down and I left the corner smiling from ear to ear.
The mapping is on the fly, there is nothing to upload or change depending on where you are, the humidity, temperature, etc. it all gets calculated on the fly and updated on the fly. It does take a while to build your base map if you're only riding the streets. But you can watch your progress via a USB connection to your PC (which is always bada$$ hooking your bike to a PC to check your map - you look like a professional racer

)
It will show you your stock map from factory and then the other tab will show you in each block how much it's being enriched or leaned. The amount of enrichment and leanment is determined on a slider scale you control to avoid you getting into too much trouble because it will enrich and lean as much as you let it.
The map itself shows your entire revband from top to bottom with the % of throttle opening from left to right. In each square it shows the + or - amount of change or no change if you haven't hit enough for it to make a reading and change. Hence my comment about tuning on the street....WOT at 11,12,13k is sometimes difficult to reach on the streets...just sayin'.
I had the 2011 S1000RR and now I have the 2013, I can tell you that the change from the 2013 without the rapid bike to having the rapid bike is a bigger difference than that change from the 2011 stock to the 2013 stock. This is like getting a new engine from BMW that delivers more bottom end power and response where I use it and want it more; in the middle.
I was also at the AIM convention this year in Orlando I met with the Rapid Bike guys from Italy and also their US distributor, The Cycle Pro. All of them were complete class acts and carry a ridiculous amount of technical knowledge and riding experience. If you're looking for a big change and the ability to customize all levels of tuning, there is no doubt Rapid Bike is what's next.
Not to knock Bazzaz (who I met at AIM as well and is a great guy and has genius level understanding of TC) and/ or Power Commander, but once you use and realize the potential of Rapid Bike you'll understand that the bar has been not only lifted, but it's altogether different and makes the former players look obsolete in this category. Rapid Bike also has a on the fly TC unit, but I can't speak to that upgrade b/c I don't have it.
Hit me up with any questions you may have - I love to talk about this unit as its performance and tunability continues to excite me and continues to renew my bike.
Give it a try, you won't be disappointed...there's nothing better than smiling in your helmet ear to ear every time you feel it.