I've had my MM Jailbird for the last ten years. After entering our full-time FLR in April 2021, I've been locked for all but five days, primarily in the MM. I have a Holy Trainer V2 that I wear to events where I know there will be security screening. I'm partial to the MM because its custom-fit is very comfortable, and I enjoy the weight of the device. The Holy Trainer is not as comfortable because the top of the tube presses into my pelvic area above my shaft, and it can not be worn for more than three days before I have to take it off for a thorough cleaning. Its enclosed style is not practical for everyday use. My one complaint about the MM is that it will slide down my shaft due to the weight. I've tried a smaller ring, and that didn't work. CM members have intrigued me with the discussion about the comfort of a smaller, lighter cage. So I ordered a Cobra Micro knock-off from AliExpress for $35. When it arrived, first thing I noticed was the weight difference. The second was the length of the tube. My MM tube is 80 mm, and the micro is 55 mm. I wondered where the extra 25 mm of my flaccid penis would go when I put it on. Me Lovely and I went to a concert last night, so off went the MM and on went the Micro. I have a 45 mm ring on the MM, so I stuck with that for the Micro. The shaped base ring easily slid on, and it was comfortable. Next was the tube. I slid it on, and it only covered my glands. My pee hole lined up nicely with the hole in the device, and the rest of my penis disappeared behind the cage into my scrotum. I turned the key in the barrel lock, which was different than the security screw in my MM, and it was on. It was erotic how small and tight it was, and the fit was very comfortable. The base ring size was perfect and the shapped ring formed to my body. Even know my penis was pushed into my body, I didn't feel any pressure. I slipped my jeans on and detected less of a bulge than the MM. The barrel lock was slightly more pronounced than the MM security screw but not that significant. At the concert, I was pressing on the device through my pockets to check the fit. It didn't need any shifting or adjustment as my MM frequently does. It stayed in place and proceeded to be very comfortable. We returned home, and the next test was sleeping. I'm a side sleeper, and when laying to rest, I always have to position the MM in the right sport. As I lay on my side, I didn't have to arrange the Micro. It stayed right in place, and the weight wasn't pulling it down. I slept like a baby. In the morning, the next test was what happens when I get an erection. Well, there is only one way to find out. I started to excite myself, and when I reached the limit, there was no more discomfort than the MM. My stiff shaft was pushed back into my body more than the MM, as you would suspect, with a shorter tube, but that was it. The Cobra Micro has impressed me so far. The next test will be long-term wear and comfort. I plan to wear it this week and will report back.