Yes I've built three all together. It goes together pretty well, you shouldn't have any problems if you've made similar kits before. I made a couple of modifications including making a small piece of bodywork at the ends under the roof (it didn't look right to me having the roof just resting on the uprights) and throwing away the IP running gear (I hate their wheels personaly) and replacing it with Accucraft wheels and axle boxes. I did this by buying Accucraft flat wagons and robbing them, not only of their running gear and couplings, but also brake handles, safety chains etc.
They look OK with Accucraft stock (at least the W&L items - see breakvan in photo) both being to 16mm - 1/19th scale. The good thing is that the cattle wagons have metal roofs, obviously the bodywork doesn't have the same sort of strength as a normal van to support the roof.
Schleich cattle make a good load.