"the field remains flat and in focus, even in short focus telescopes."
Not an encouraging thing to say. In reflectors or refractors or both? Very different focal plane shape in each, and most Baader eyepieces are not Newtonian friendly...
Such comments are misleading, even contemptuous of the public. Why can't manufactures just be fair dinkum and say whether their eyepieces best suit Newtonians or SCTs, Maks and refractors? Newt's have a different focal plane shape to the other three, and very, very few eyepieces will do well between the two different shapes, little lone the huge range of focal ratios on offer too.
I guess time will tell,
again, how fair dinkum their claims are...