I have been using a big black plug for a couple of months. The first time I managed to insert it I saw stars and was concerned that I couldnt get it out. Hurt more coming out than going in. Now I manage to keep it in for perhaps an hour. So time to step up. This plug is about a quarter size bigger round so more of a challenge. I think that the training from the black plug - which is bigger than some of the large dildos I had been using, gave me the experience to try the Ace. It is a big plug and it took me three attempts to get it in and wow when I did. It hurt so good. Again a bit of panic - can I get it out took a bit of straining - all part of the fun and then an eye glazing pop. Highly recommended but one for the serious player.
My wife and I bought this as the next step in our anal training. We tend to focus our ass play on her as she prefers it much more than I do. This was certainly a challenge! It has taken her some gos, an awful lot of lube, and a lot of priming by myself to have her take it in about half way but it has been a pleasure to watch her attempt! The material is quite firm and it is not a very gradiated shape so I would reccommend only for those who have already started trying huge plugs.