This set is an intermediate set and NOT a training set. The longest one is actually the easiest one to get in because it starts small and gets bigger. My spouse has sworn off ever using a plug because this one was the first experience. It's just too big for beginners in back-end adventure.
However, they are very squishy and soft and easy to clean. There's nothing wrong with them and I would definitely purchase another product from this company! These are quality plugs just not great for us!