I think the burson is good for headphones which need a little help coming to life but it might make some other headphones sound a bit to lively/bright/forward. At least thats the impression I get from it. It makes my HD600 and DT880 sound much more punchy and vibrant.
I would mostly concur with this. I find the Burson to also be on the warm side of neutral, but the combination with the HD600 is excellent. I likewise quite enjoyed it with the HD800.