I'll be saving for a while:
For the nerds on HN, the difference between a good grinder and junk is the consistency of particle size. There's an optimum particle size that will result in the greatest amount of desirable flavours being extracted; most cheaper grinders will spit out a wide gamut of particle size.
One of the most important jobs of a barista is to manage the grind fineness to optimise for the beans.
The reason that perfect espresso isn't made by a robot—the reason why the process is so variable—is because the source material (the beans) are volatile. They're constantly changing, each batch is slightly different, their properties change as they off-gas every day from when they're roasted, and they're greatly affected by storage and ambient humidity. Some of these variances can be compensated for by adjusting the grind.
It's not about grinders but it spends a few chapters on how coffee is produced and how different factors/regions can affect its flavor. It's an excellent primer on coffee in general, and of course on roasting at home (though the chapter on machines at the end is a little outdated).
In contrast, consider the Breville espresso machines. They make great coffee reportedly, but I understand they're next to impossible to service or fix yourself. I heard that a technician is required to merely clean it, much less repair it (maybe a machine owner can chime in).
So I guess you gain some and lose some with economies of scale and espresso machines.
I put the cylinder (~= group head) in the water as I bring it it up to temperature, and get extremely consistent results.
I have a PID controlled kettle, and a high end burr grinder. The setup compares favorably with high end manual machines at work.
I usually make two batches (2 double shots) with the flair, fwiw.
More often than not I'll make multiple beverages with it in a row. It's good enough that I'm frankly worried that when I finally upgrade to a proper machine it won't feel worth it. I had been looking forward to getting my fancy espresso machine eventually, so this is weirdly disappointing.
I love espressos, machiattos, lattes and have gotten to the point where I’m consistently producing both espresso and lattes (with art!) that I prefer to many reasonably good coffee shops.
It took me some time to learn the machine and how espresso works, but I got to geek out in the process. Highly recommended for people who are more interested in the journey than the destination.
Around 5 years ago I restored a La Pavoni Europiccola manual lever espresso machine to working order. I bought it off of a "parts only" ebay listing for $200. It turns out it just needed new grouphead and base gaskets, some rustoleum, and some simple electrical work (new power switch and thermostat). After getting over the initial learning curve, this machine has consistently given me some amazing espresso shots, all while on a tight budget.
If you're interested in seeing more of these kinds of restorations, check out these videos from the Orphan Espresso guy, who is incredibly skilled:
https://www.youtube.com/watch?v=2_Ymz8YJpcE https://www.youtube.com/watch?v=L_k-08sVlPw