[mjlee]

I'm afraid this isn't completely true. You can still be interrupted for capacity issues no matter what your bid is. It's quite rare on more common instance types, but becomes a problem if you have more than a few GPU or high memory type instances.

[Aeolun]

I don’t think I’ve ever had my instances taken out from under me when I set the max price to the same amount as a normal instance.

That said, when we exceed capacity we cannot boot any more instances, that’s definitely true.

[sharms]

I thought this was true, but I have had spot instances go away even when going above reserved instance pricing.

[reilly3000]

Just don’t plan on playing in Black Friday when every box on AWS is tied up by one retailer or another.