I completed the Juli Ashton course and now I am ready to play! I love this set of plugs! I had to start at the smallest one because I am definitely a beginner, but once I did, I kept going larger. The smallest one is pretty easy to get in, especially with the included lube, and once you turn on the vibe it relaxes the muscles a little. That probably is the best part about it, teaching you to relax while having your ass stuffed. I like to put it in and wear it for a little while. When I started to not notice it, I moved up to the next size. I've mastered all four sizes and now I am ready for the real thing.