I own both a MASHO, a Mr. Limpy XS, and a RM packer, though I haven't ever tried the sailor packer. In comparison to the Mr. Limpy/MASHO, the RM Basic Packer is definitely much heavier and I personally only use a harness with it under underwear for a sense of security. The RM is also less squishier and malleable than the MASHO, though it wouldn't be rigid/hard enough for penetrative sex of any kind, it's just a bit firmer than the MASHO. It's extremely realistic if looks are important to you, and could definitely pass if you're just looking at the packer itself. I noticed that when packing with the RM, it would stay in place and I packed it down and to the left. I'm a smaller guy, so I had to be careful and check myself every so often to make sure it didn't look like I had a boner. I have packed with the RM a few times but I feel like if you want a realistic look for your packer and good durability, then it's a good match for you. Personally, I like packing with my MASHO and Mr. Limpy occasionally because I don't have to worry about checking myself for a boner every so often. If you have any specific questions about them, let me know.