It's pretty great. We don't really do it for domination, but instead for the appeal of gender role reversals. As for advice, it kind of depends on where you are for anal experience/comfort. I personally don't really like going too deep (uncomfortable feeling) so I only have toys shorter than 6". As for width, it depends on where you are. I have a wide range from 1.5" to 2.5" in diameter, though the largest toys generally aren't so great with thrusting. I've really enjoyed the Vixen Lone Star, it feels great for me and looks amazing on my partner, but it is on the bigger side, at about 1.9" in diameter. But I do like the Vixskin dildos because they are more flexible and sort of more forgiving at the awkward angles you might encounter beginning strap-on play. Feel free to message me if you have any specific questions I can answer.