Overall, it's a very solid grinder for the price you pay and I'm not sure that you can do better for $300. Solid build quality, excellent customer service, and excellent grind quality. I couldn't ask for more.
Positive Product Points
Small footprint Easy adjustment No clumping Good grind Minimal grind retention
Negative Product Points
Adjusting the macro moves the micro ring Would prefer an on/off switch rather than timer Some plastic parts Could use better cord storage underneath the unit
I purchased this grinder new from one of the forum members there. Been using it for 5 months now and it has been working perfectly without issue. For the price, even if you buy it at $300, I don't think there is a more versatile and capable grinder in this price range. I think the build quality is pretty good for a machine of this price. The sides are plastic but it feels very solid. Since I single dose the one thing I wish the machine had was an on/off rocker switch rather than the timer. The timer is rather useless in my opinion since it's inaccurate at best. That leaves me with pressing in the pulse button the entire time during grinding, which isn't a big deal since it takes 12-14 secs to grind 18g, but I'd rather just have an on/off rocker. Adjusting itself is rather easy. Just twist the collar of the hopper for your macro adjustments and the move the ring to adjust your micro. The micro is what makes this grinder a significant improvement over other stepped grinders like the regular Virtuoso's and the Rancilio Rocky. With those machines you can sometimes get stuck inbetween steps but with the Preciso you can adjust it perfectly. The fact that it's a stepped grinder that is easy to adjust makes it a better than a stepless grinder if you're also using it for drip, pour over, or press. Adjusting the macro does sometimes move the micro ring, so I would keep a finger on the micro to prevent it from moving. The cord is a little long and stiff so I would invest in a zip tie or something.
The grind quality itself is very good. There is very little clumping, if any, and so far it has been very consistent. I've seen videos of grinders in the same price range like the Rancilio Rocky and that one throws out a ton of clumps. The operation of the grinder itself is fairly quiet and non-obstrusive. You're not likely to wake or annoy anybody up from using it.If you dose right into the portafilter you do lose some grinds, like any other grinder, so there are some ways you can keep your space clean and keep your grinds. Use either a yogurt cup or an Orphan Espresso dosing funnel with your portafilter. I like to grind into the bin and pour the grinds into my PF with my dosing funnel then do WDT. That way I don't like any grinds on the countertop. There is minimal grind retention so it's not like you're losing much in the chute. Before grinding my beans I do turn it on for a few seconds to get rid of any residual grinds which there are some but not much.
Maintenance of the grinder itself is simple and easily explained in the manual. Every few weeks I like to open it up and clean the burrs with the brush and some compressed air. Easy enough to take apart and easy enough to put it back together.
I think the concern with this grinder is the build quality as it seems others have had issues with the gearbox or what not. I have to say though there is probably not another company that offers the same level of customer service as Baratza. Try getting Mazzer, Macap, Compak to help you for any concerns on their machines, not going to happen. The Baratza website is full of information. There are many FAQs and PDFs to solve a majority of issues with your grinder. Again, that's a lot more than what other manufacturers post on their pages.
Bought from a forum member, so can't really comment on a vendor here.