You are very welcome! What is the other toy you have? I'm curious as we are always looking to expand our anal toy collection.
We have had sex in reverse missionary, missionary and also spooning. Just play around and see what works for you guys. Woman on top can be a little sore for him, so I lean forward into reverse missionary and that doesn't seem to bother him at all.
The Aneros will stay absolutely put until you remove it, so any position would technically work, but they aren't all the most comfy.
Feel free to ask any other questions you have.

I'm always happy to respond. It is a great toy, but does take a little practice.