I've been a vocal advocate of the 2 above mentioned article tools for some time, and this morning did a bit of a comparison. for this test I checked the index rate of approximately 500 articles of each type using SB index checker running repeatedly until all were either YES/NO. This method unfortunately gave me alot of false negatives as any site thats been abandoned/rebranded would show up as not indexed, so I then identified these with SB link checker. All the articles are either posted on my own private blog network or the Fightback network. I could have included a few other sources but this was a test of my current methods, not a case study of different methods. The results in percentages was as follows Content Spiffer - 82% the way I use CS is to handpick 10-20 articles and mash them up at the sentence level with all other articles in the same folder. This gives an article that is very readable, although maybe somewhat jumbled and all over the place. It does look very human written though - maybe as if it's written by someone on meth! Articlebuilder - 68% I think this will greatly depend on your niche, I seriously doubt that anyone in the weightloss niche would get the same figures, but I'm lucky as mines not too saturated. The way I'm using this is to choose a 500/600 word article with phrases, not words, spun by the articlebuilder site. Hand Written Hand Spun - 72% I'll admit alot of these were grabbed articles that were hand spun, although they were spun either totally manually or manually within TBS - no auto push button spins. So no groundbreaking results, as all figures were roughly to be as expected. I would have thought that hand spinning would have been the best, and was a little bit surprised that CS won. The main reason for this excersise was to check up on my methods rather than a case study for you guys, but I thought someone may be interested.