OK, here are my impressions about Implicit creations medium Core plug. I guess we can share our experiences about plugs in a thread about long term plugging.
I've had it for about a month and I feel I've got it tested through and through; it's been my daily driver since I've got it.
Material: medium soft silicone with a glossy finish. It is smooth, but draggy like no other silicone toy I've had, and lint and dust are attracted to it like moths to the light. A quick rinse before use is mandatory to wash off the dust particles. A quick violent shake is enough to get the water droplets off. The neck is pliable enough to be comfortable to sit down plugged it in every possibe position (reclined, half reclined, on the side etc) and even on hard surfaces. Bulb can be squezed a bit, which makes for easier insertion. Easy to clean, although it keeps smells (most time it's in my butt, so doesn't bother me 😃 ). Molding lines can be felt with a finger, but not an issue while wearing. While a seasoned plug wearer might insert it with just some spit as lube, I find that sometimes it is better to lube it with a bit of coconut oil to get it to sit in place really well, spit can dry out too quickly for this. After insertions I (usually) don't relube and wear it for about 8 to 10 hours, the plug is comfy all the time. The material gets a 8/10, I like the platinum cured silicone of my Doc Johnson plugs better, since it is easier to clean, attracts dust to a lesser degree and never requires oil as lube for setting in.
Shape: This is the main feature of the plug; tappered enough to insert easily, but not too much to make the plug too long and poke the insides. Bulb is wide enough to be noticable even after a few hours but not too much to make excecss pressure on the insides and start to feel uncomfortable. The neck is long enough to position the bulb behind the sphincters so no fear of slipping out and does not to pull the base inside. The base is the most unobtrusive of all plugs I've ever seen and tested (and I've tried them a lot), doesn't chaffe even after hours and hours of wear, no matter sitting or walking. Does not protrude out so I can sit on it without fear to push the plug too far in and poke. Big enough to keep the plug in place at all times and no fear of plug slipping inside ever, no matter how lubed or what acitivity doing plugged. Since it is rounded it is difficult to make the plug to stand on a flat surface, which would be nice since it is a total lint magnet, but would make it less comfy, so I guess it is best as it is. The shape gets a sounding 10/10 mark.
Experience: The shape is a winner in this department, too. Base can be felt on anus, neck can be squeezed on and the bulb gives you the nice full feeling. None of the feelings get overwhelming over time and thus uncomfortable. It does not distract from serious work, but gives you all the joys of plugging all day long. Gas can be passed, so no problems there. It is just perfect!
I know this is my experience and thus highly subjective, but since there are 3 sizes, everyone should be able to find the one that suits you best. I have the large Core plug, too - everything like the medium one, but since it is bigger I can wear it only for a couple of hours before the pressure inside gets too much. So, check out the measurements (the ones on the website are accurate and Core plugs are somewhat larger that other plugs of the same "class") and keep in mind that for long term wear a smaller plug can be better than a larger one.
Overall it is a 9/10 (because of draggy silicone which attracts lint), but once it is in, it's a pure 10/10.
Happy plugging!