I think it's great.
Most folk would say I'm contrarian but I really believe foreign investment - and the UK has by far the most in the EU I'd guess if not up there globally - is a good thing.
When you think the shape the Eurozone is in right now, isn't it good that America, Japanese, Indian, Chinese companies are investing in us? Whilst there's no doubting that profits can (and are) often transferred back to holding companies based in these economies, it's well worth remembering this profit is taxed.
I've seen this in Oil & Gas myself in the North Sea, where more and more companies are foreign. Not only are they spending money acquiring our companies and knowledge, they're hiring/retaining our people and allowing us to export our capabilities to other economies.
I'm a strong supporter of FDI - the alternative e.g government ownership, isn't worth contemplating for me. We've been there and it's not good.