Global Redirect & Domain access

I found out that Google is indexing all versions of the same node with each language available en/node/xxx, es/node/xxx, it/node/xxx and so...
It seems that Global Redirect module fit to resolve this behavior, however I've seen that there was some problem with Domain access in the past.
Do you think it is wise to use it on a production site now ?
Is there any precaution o specific config to deal with, having Domain Access ? (I'm using a mercury stack: Pressflow + memcached +varnish...)

Thanks for the tips.