Luciano,
welcome to the forums!
i have seen the Cavalier resin Zim (for the Stug waffle pattern) and it looked great.
the sheets were very flexible, not at all what i was expecting.
i had thought they would be thin, stiff & brittle, instead they were thin and floppy.
they looked easy to work with.
Ridleusmc - i have built the Tamiya Panther w/ the Eduard (PE) Zim included.
it looks good. i had a bit of trouble getting big sections on straight
(at least on the first try)
but it went pretty well.
you will need to use putty here & there to hide joints where sheets meet,
but no big deal.
one problem i had was putting CA fingerprints on the pattern while getting the piece on.
but i was able to pick out the CA w/ the back of a hobby blade & pin.
one thing to look out for is in the painting stage.
the texture of the Zim will prevent the paint from 'flowing out'.
so you have to be extra careful to build the color up evenly.
i quickly learned that you can 'flood' the ridges if you airbrush too heavily in one spot.
once again, a pin or the back of a hobby blade will clean out the valley and hide the error.
good luck.