Okay, I have to chime in and give my opinion. There is NO way I would get into milling zirconia, way too much of a learning curve with the stains, the right pucks, the overhead (i.e. sintering oven, heating elements, stains and figuring what works best with what pucks, the price of the pucks, the burs). If you did a cost analysis, you can easily find milling centers out there that on par or are far below the price, don't add that migraine to your day. Now this is from a guy who is completely digital, we scan and design everything and we also have a Roland mill as well. The labor, employee headaches isn't worth it to me, now to be fair, If I was doing quite a few of zirconia implant retained full arch substructures I'd probably have a different opinion, but for the 'mac and cheese' work, scan/design- outsource it to a reputable and reliable milling center and you'll be going home early. Now if you want it to mill wax/pmma, then I'd say go for it, we found it to be very advantageous in our lab because hand waxing in my opinion is way too time consuming. So as others have stated, know what you want to do with your mill and then let that determine which direction you should go.