using the Amazon cloud

I was interested in hearing any opinions regarding the use of COMSOL in the Amazon cloud. We currently have limited computing resources in house and so we'll either purchase a new machine or switch over to using Amazon EC2. I have heard that Amazon can be really useful when the need is for LOTS of RAM or when performing parametric sweeps; I also heard that it is relatively slow (like a 10 minute computation performed locally might take hours when operating in the cloud). I'm interested in hearing anything about your experience using COMSOL in the Amazon cloud, including (but not limited to) how easy was it to setup/use COMSOL in the Amazon cloud? and what has been your experience with performance?

Thoughts/opinions regarding your experience with Amazon cloud is very much appreciated!

Best regards,

John