I'll keep it short... Buy It
I've had experience with Arturia's software in the past, and I was always quite impressed. When I decided to downsize to a 49-key controller, I was completely overwhelmed by the combination of so many strong contenders and the lack of a "real" piano feel in anything smaller than a 76-key device. I'll be honest, after trying out everything I could find at local shops and even that shiny big-box music store in Ventura, I ultimately purchased this package for two reasons: 1 - I knew the software would be worth the expense even if the controller wasn't up to par and 2 - It's easier to deal with a return/exchange from Sweetwater than anywhere else in the business.
To keep it brief, I couldn't be happier. The fit and finish of the device is leagues beyond the price point (think high-end Kurz-like construction) and the key feel is "more" than on any other semi-weighted controller I tried. Combined with Kontakt, I am able to coax extremely subtle nuances from my sampled grand pianos by simply playing the way I would a traditional 88-key hammer-action device. Essentially, it seems as though the same attention to detail, consideration for intended users and uses and ultimately pride went into this hardware as I know Arturia puts into their software and have always heard they put into their premier hardware systems.
I honestly haven't taken time to map all the knobs and sliders in my daw or plugins yet, but they are handy and "real" when working with the bundled synth software. I'm sure they will only add to the already considerable value. If you are going to get a controller, this should be a no-brainer. If you're considering a workstation for less than $2000, I'd seriously suggest this and a macbook loaded with Kontakt - all of which would be less than $2000 and compete with workstations worth twice that.
If you're looking at this page... Buy It. You won't be sorry.