I have, and love the heck out of, my Alumina Motion, and I'll be trying out the Flow from the same line soon. In terms of experience, it's a lot like steel in the firmness department, but the weight seems shockingly light when you first pick it up, if you're used to steel. I can thrust my Motion between two fingers as fast as other things with a whole fist.

In terms of cleaning, just as simple as steel. I don't bother to sterilize my Motion because I only use it vaginally, but I have heard of people who had an aluminum toy, and bleached it or boiled it semi-regularly, and then got a new aluminum toy and noticed their old one had faded/washed out. I think that was a Verganza/Venganza (I forget the name) design. Either way, perhaps they fade if bleached.

But I love mine. The firmness and the light weight are really something else. less