I used Aber extensively on my recent Sherman build, it really enhaced the final product in my opinion, there are several items that simply cannot be fashioned out of plastic to still be in scale. I am newly back to modeling, but consider myself reasonably capable. I used only new blades and an optivisor whren working with the items.
That said, I do have specific beefs with Aber:
Their instructions are confusing at times.
Several, a quarter to a third, of the parts are so small that I can’t see how anyone could affix them to a model without a drop of glue that is the same size as the object, ie wingnuts, etc.
They also expect you to be able to manipulate things that are far to small and delicate to ever be manipulated. As an example, the tool attachment straps for my sherman, the belts were very small and delicate, but the Aber set also includes buckles that one is supposed to actuall thread onto the tiny straps. They are so delicate, literally about the size of a typed, lowercase “o”, and include a cross bar and a pin to engage the holes in the belt.
To me, it’s ridiculous to expect someone to make a belt out of separate parts in 1/35. I just wrapped the items with the belts, then glued a bukle on to after I painted the straps leather. You have to look very close, closer than anyone other than me has looked at it, to see what I did.
The .50 parts are similarly unworkable, I believe there are 2-3 pieces for the rear sight, I simply can’t get parts that small to stay together without using glue that obscures the parts.
It’s the only PE I have used other than kit included PE.