Is the London System good for white?

Is the London System good for white?

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The London system is a System for white and it is okay between Easy to Intermediate levels. But why is it that it doesn't work for experienced levels? You can switch to queen's gambit (at least I heard so) but if black plays properly to counter then you will lose your advantage. 

One possible response for black
Another possible response from black
ANOTHER possible variation
Then in Gagra, 1952, The London System came out in the game Kotov VS. Petrosian
 
So this the London System!
 
~THE END~