Being a long-time MPC owner, my main reason for going with MASCHINE was that it really captures the familiar drum programming workflow of working with a dedicated device like an MPC. Early iterations of the software weren't very good, but the product has steadily improved to the point where AKAI Professional (makers of the MPC line) is now playing catch-up.
My main issue with MASCHINE is that the DAW integration appears to be an afterthought. NI currently seems more focused on turning MASCHINE into its own little standalone production studio. It's probably good for sales and marketing, but it also makes MASCHINE seem like its not being geared for use in serious studios. It's fairly obvious that they've nailed emulating a dedicated device, now they need to focus on MASCHINE's real strength and refine the software to work more efficiently and predictably. The recent 2.0 software release was a great opportunity but it seems to have come up a bit short.
I've highlighted my biggest concern with MASCHINE in this
recent thread in NI's forum.
Nevertheless, Congrats Alex! I highly recommend that you pick up some of the MASCHINE Expansion packs that are on sale for half-price until 12/9. Those expansions add a lot of bang for the buck. Let me know if you have any questions about getting MASCHINE working with SONAR.
-e.B