We run a bunch of production workloads on them. Just look at the spot pricing history in US-East-1A and 1B for a good idea at the stability. This is over a yea

We run a bunch of production workloads on them. Just look at the spot pricing history in US-East-1A and 1B for a good idea at the stability. This is over a year now and only once did I have any sort of interruption and even there it was in only one AZ so of course I had other instances up and able to take the load.