Are they really ready and comfortable for a work in Zbrush? I am especially interested in those non wacom ones like surface pro and especially Acer Acer ASPIRE R7-572
http://www.pcmag.com/article2/0,2817,2453578,00.asp
http://store.acer.com/store/aceramer/en_US/pd/ThemeID.35703000/productID.291669400
Do somebody have an experience? How is the pen ? Monitor?