I've experimented with low-poly models so far to test it out, but from what I've seen it can handle fairly high-poly meshes, though I suppose that depends on the computer the model is being viewed on.
The first guinea pig was my low-poly, low-texture shield. Works smoothly enough.
The second, and much more recent attempt was a voxel interpretation of a Platehead, an alien grazer.
For this voxel Platehead I used a similar process to my voxel shark:
Begin with a profile of voxels
Add layers and 'chisel' voxels untila shape is achieved
Flip the voxel model
Add texture. Complete.
In other news, I've been working a lot more on DoodleDemmy.co.uk lately, and now it is complete with a gallery, xenobiology, and modelling section. Give it a look please. I'm also slowly moving my blog over to it, too, so posts may get thinner on this feed.