Mine just arrived. Lubed 'em up a slight bit with hearing-aid goo and slipped 'em in. Perfect fit. I got the clears 'cause I walk with mine and clear matches the 846 AND doesn't draw attention. Stealth iems.
Sound is very good. I'm not noticing muddy bass as some suggested. If anything it may be a bit clearer (Pono using balanced cable). I do seem to have a bit more sparkle in the uppers. Probably because I was using Comply Pros and they muffle top end a bit. Blued modded filters on the 846.
Of course I had just gotten back from a walk when they arrived, so I'm sitting here listening. Tomorrow they'l get a real-world test.
When I called Claudia last week to see when they would be shipped, she told me Weds ship and Fri arrive (I paid for two-day shipping) and here they are on time.
My impressions reached them April 1st and they came back on the 17th. So slightly more than two weeks but factor in the weekends and that's very quick turnaround.