I have not used them but in my eyes with the moersch chemicals you have the advantage to see a variaty of samples pictures at http://www.moersch-photochemie.de/co...alerie/lang:en. He is very helpful when approached with questions (he is a member here as well) and provides a lot of information (see e.g. here.

I rarely do lith and am still on my first set of Maco lith; when it's empty I will buy Moersch's lith.