..recently I was sent one of these to test.. and directly ended up buying a matching pair of them shortly after the first day of testing!.
The DPA4011 is a cross between a 57/121 but as a single mic. it really holds its own in the absolute perfect mid section of a speaker, translating this to recording very well. the lows are tight and the highs are not shrill or fizzy. its a C shaped mic only, in a long pencil format. so this makes it perfect for spot miking (room) or perfect close micing placement. I was pretty shocked at how well this mic translates accuracy.. and I didn't need to "engineer" as much as I do other mics.
Whilst this mic really does do well on its own, pairing is still possible. but its harder. - 121 does not work here, neither does the Neumans, SM7B is OK, and the Unidyne S545 Shure mic is where its at though. just as long as you keep the DPA for the "sound" and the 2nd mic for balance only.
I feel like this is a big leap, and whilst ive only covered a few profiles with it, so far the results have been very pleasing to say the least!. - I will be using this for a long while to come!.