Dropzone Commander Card Terrain with 6mm Minis

This is for "Mr Average" from TMP.

I initially thought "6mm with 10mm buildings?"
Small scale minis with big buildings (especially big windows and doorways) = stupid, right?

But I plunked down some models on terrain..... and was surprised how well the models fit with the roads....

The 6mm vehicles fit the road markings really well. Note the thin cardboard base tiles curling up which I complained about in my review.

But what about the doors and windows etc? They are usually the biggest give-away for out-of-scale stuff.

You could drive a tank through that door.... literally...

The infantry are dwarfed by the air conditioning ducts...

This angle isn't too bad, although it IS a generously sized doorway...

This show illustrates how the 6mm fits well with the roads, but poorly with the buildings....

Verdict
Ultimately it's up to you. Whilst the roads are a good fit, the base tiles are the worst part of the DzC cardboard set.  I personally am not a fan of having huge doorways you could drive a tank through, and it's not like there isn't a plethora of affordable 6mm terrain options.  A while back I bought (and reviewed) some 6mm terrain from Brigade Model: buildings were only $1.50-$2 each. 
To be honest, 6mm is the one scale I could never be bothered scratch-building terrain for as it's so cheap and easy....

While you COULD certainly use it for 6mm if you weren't fussy - why bother? It's not like 6mm terrain costs that much anyway....