I have not experimented with high-contrast developers yet, or additives. I have only used run-of-the-mill things like Ilford MG and PQ. Based on this, and my admittedly limited printing with it (one box of 8x10), I'd say it is a great paper. Sometimes it is hard to get enough contrast from it, because of how well it retains detail when you increase filtration. However, this complaint only comes up when I am going for a very harsh look. I find that Oriental VC is better for that. It is great for most things. It is excellent from printing from contrasty negs when trying to get a more "normal" look.
I find that it is pretty neutral in the two developers I mentioned. The PQ adds a little "pop" and a little warmth over the MQ. I haven't extensively tried toners yet, and I have not tried lith printing with it.