Eastern Europe is hit or miss. I had some good experiences and plenty of terrible ones (more so recently). I think that eastern Europe used to be good, but there are plenty of actors milking the scene and reputation of eastern Europe. I know 2 smart fellas making bank selling remote junior developers from Hungary and Poland to London clueless companies for slightly cheaper than senior London prices.

India, middle east, south asia has been an absolute nightmare every time we tried.

I think the future of outsourcing is going to be Russia: they can't speak English if their life depended on it but they're capable developers and paid ridiculously low. A few more years and people will start being a bit more fluent in English.

This is still assuming the USA and Europe will still have any relevance - maybe they should start learning Chinese.