I got my Copplestone Dwarves and we compared them to Vos's GW warmaster Dwarves.
The Copplestone ones are a fair bit taller, and a bit chunkier - you certainly wouldn't want them on the same base. They might work in the same army. This was a bit of a surprise as most of the other copplestone stuff scales very nicely with GW warmaster.
The Copplestone ones certainly look fine when put against Warmaster human sized figures.
The figures are very nice, very clean sculpts - it would perhaps have been nice to have some command variants between the packs.