I'm a few days in with my se846's. After looking for used and considering gray-market options (and then considering their "B" ranking on Crinacle's List, general comments about them having been "good for their day", etc.), I decided to just buy a set from a reputable dealer.
It's been a while in coming. My last big IEM purchase was a set of ie80s a few years ago, and before that, the se215. I wanted something with more detail and less congestion, that could open up music a bit more, like a regular headphone. Most of all, I needed something well-built with superior isolation (I have a three-year-old in a small house). Considering my heavily used/abused se215s have lasted 8 years without any issues, that was a big selling point. Also, since there are not many places to try iems in my area (and nowhere to audition higher-end Shures within a day's drive that I could find), my purchase was blind. I can read about Andromedas, Xelentos or FH7s all day, but I had no idea if they would fit, or hold up to my use case. I also have no time for "ear jewelry". I don't care to impress anyone with my taste in audiophile gadgetry. I want good sound, comfort, reliability and longevity.
I made a somewhat informed choice and dove in.
So far, so good! The kit Shure sells right now includes the basic cables, a soft-shell carrying case, the filters/filter tool, assortment of tips, and the most recent bluetooth cable set. Most of this I could do without (as I could do without the *crazy* MSRP for an 8 year old product in the current competitive environment). I am disappointed Shure deleted the hardshell case from the spec, but I picked up a Pelican 1040 and foam for about $30 so no biggie.
But the earphones are great. I'm enjoying the deep bass, the instrumental separation, and the overall tone over a range of musical styles. I don't think these are amazing for treble (using the blue filters, haven't yet experimented with others, I use the olive tips, as usual). The mids are strong and musical. Jazz, rock and pop all shine. Percussion has depth. I'm hearing a lot of "new" detail in good recordings of music I already know.I I like the fact these are iems I can fall asleep using without regret.
I won't overextend my analytical abilities by describing the sound, as there are 1375 pages of impressions here. Basically, I like the se846. Barring some other revelation, I can see myself using these for several years. I have the option to return these, though the only reason would be cost. If I can get past paying 2013 prices for 2012 technology in 2020, all will be fine : )