All things equal, I like the feel of a good Burman box better, but I've also experienced more bad Burmans. ZFs have a nonstandard size bottom seal, so it takes work either to find it or machine it for a standard seal. This box is quite good. My Super has a good ZF too, remachined for a standard seal.
I got four plastic crates or parts with the car, seller found more stuff so I'm going to pick up tomorrow. Also happy to have more parts.