Mine came in today, and so far I'm very very happy with them!
I ordered a set of smalls, along with a level attenuator for my amp to use with my Westone UM1. My first impression was that they were a tad smaller than my short comply tips. They really are a hybrid of the standard foamy/comply foam and the shure soft flex sleeve and I really like it so far. They seem a lot more durable than the complies, I've tried washing/scraping wax off my complies and they kind of got damaged, though not severely; these seem like they would be able to withstand that.
Size is very similar to the short comply and about half of a standard yellow foamy. The diameter is slightly smaller on the black foamy, and it's a tad shorter as well.
Fit is very good, they mold to your ear very quickly, I would say faster than the comply tips do, and thats fast! The weird thing about them is, I couldn't tell if I had a proper seal or not, it was kind of weird. It sounded perfect, so I knew i had a good seal but it just didn't feel like it. After a while I started to like this feeling a lot. It made my head feel less congested and "drowned", which is the main thing i hate about bi/tri flange tips. They sit flush in your ear without any discomfort, these are the only tips to beat the comply in comfort!
More later, I need to listen more before making any comments on the sound.