I like the keyboard and I own the 49-key controller. To a large extent, it's a matter of pricing for me. For the $265 US I paid for The Laboratory with the controller AND 3 free synths, it was a no-brainer. I like the touch and the keyboard is very solid and heavy. It may not satisfy keyboardists who prefer a different touch. I'm a guitarist who is improving his keyboard skills, so take that into consideration. I could not find anything with 49 keys in that price range that I liked as well and the software was a pleasant bonus.
However, the Laboratory software is another story altogether. I find it buggy and it lacks 64-bit support. I would call it a great concept that needs some work. So far, the Arturia synths (Jupiter, Prophet, and CS) that I chose are working well in 64-bit Reaper with 64-bit Windows 7.