I have put SP6 on servers that were having stability issues with SP5 and had very good success. The iPrint issue is the only thing that seems to apply to most of my environments and that is easily dealt with. I even put it on one of my web servers without any issues at all. The only place that I haven't put it is in my cluster servers because there were recommendations in here to NOT do that. Is that still the sentiment? If so, why?

I haven't had any major issues with it and would like all my servers at the same version of everything, if possible.