I am a BA player and I don't think they look nice.
I should moderate my tone a bit - I don't like these things but only because they just looked phoned in. They took a generic set of HH era power armor Mk WhateverMcPants and just copy and pasted the BA emblems on it.
Doesn't really look inspired to me. The BA tac box at least had some torso that were really nice - like the one with the embedded chalice on the chest. Helmets with a unique, distinct feel to them amongst the 40k marine line - I just don't see that with these BA kits.