Yeah thats pretty much the only thing I use. 95% of that was done with them and a really bad render I did. I've made some changes already and I think its looking alot better so far.
*edit*
I updated it.
I think the second is much better then the first. I didn't get rid of the pixel dust but I brushed over it with white to kind of make it seem like it was more connected to the center...anyways any better?