Received the Comply tips yesterday and gave them a few hours or use. Initial impression is that the seal is drastically improved over the silicone tips, and they seem to stay in place much better. I was initially a bit concerned, as they appear smaller than other foamies I have used including the IM716's / ER6's, and the stock UE's. But it was not an issue. And most importantly, they fit the stem perfectly, without any mod needed!! They are a bit pricey, and durability / "cleanability" will be primary issues when it comes to deciding to purchase replacements. Time will tell, but for the most part, I think they sound great, and are MUCH more comfortable than the UE stock foamies.