Does this mattress cover make crinkle noises when you move around on it?

It makes a sound, similar to when you compress a feather down filled comforter. A soft crinkle that isn't unpleasant, but definitely noticeable. I don't think any cover that's waterproof would be able to avoid this.

Does this mattress cover make it very hot to sleep on the bed like others?

For the record, the Linenspa mattress encasement is not hot. They’re out of stock right now so I was considering getting Utopia instead but not if it makes my bed hot. Eek

Is it durable? How does it stand up to multiple washings & drying?

If you're using this to prevent the movement of bed bugs into or out of your mattress (or even just to protect your mattress in the absence of bed bugs) but you still wish to wash this, buy two. One that you leave permantently sealed on your bed (this brand) and one that is over it that you wash (different one, not water proof). While this handles great with washing and drying (I have washed and dried twice without any loss of life), the washing process throws your washing machine around (as this is water proof inside), and the drying process takes multiple no-heat air dries, plus all day of having this propped open over furniture.