I'm very low-tech, and I like Poser 4 mainly for the transparency feature which really helps with realism in several key areas, and the better face detail possible with Poser 4 texture maps. Mapping Poser 3 eyebrows is usually a pain, and the finished results with Poser 3 textures are usually unspectacular. I used the very first Poser 4 patch released last January(?) and haven't tried the others because of scary reports such as Tim Burton's dresses and lingerie not working! I don't know if this is true, but I dare not chance it.