I decided that the chaos half of the Age of Sigmar boxset would make a nice addition to my chaos warriors army. Once the boxset arrived, I put together the warriors first. Cleaning the mould lines was quite time consuming, getting the knife blade round all those spikes....so many spikey bits! Assembly was straight forward for the most part, the instruction booklet is comprehensive. I would advise dry fitting every component before you apply glue, not just the ones suggested in the pamphlet. One or two of the assemblies are almost as challenging as Rubik's Cube.
I wanted to stick with square bases to fit in with my existing army, so was keen to see how they looked. In skirmish formation there's no problem whatsoever, but if you want them to rank up like this care should be exercised in how you fix them to the bases. These are temporarily attached as a test, to standard GW plastic bases (although no longer standard I guess). As you can see it is possible to have them in close formation, you might have to put a rock or two in place to make ranking easier.
Finally, how do the new figures compare with existing chaos warriors? This photo shows the newcomer among some of my collection, they match particularly well with the existing plastic chaos warriors. The red armoured warrior is raised slightly by a magnetic strip. The odd one out here is the figure on the right, that's an Avatars of War corrupter. He's a little smaller than the others (compounded by his shorter base), but I will happily mix all these into one army.