It does pretty much the same as Lightroom, so if you've forked out £200 for Lightroom you may aswell use it, unless you find DPP works better for you.
As a user of DPP myself, if it safe to assume there may not be much advantage in looking at other products, as they may produce similar results ?
Thanks for the responses.
I've been using LR for so long now, I find it difficult to contemplate using another product.
But Zeugma suggested, maybe DPP has a slight advantage in terms of processing the CR2 format.