I had to position BHD
in one last year, my first (& only) 4 engined jet so I may be biased.
They were quite nice inside, 3x2 leather seating, the roof does come down a few inches in the middle of the cabin (where the wing area is), the overheads are small (but I believe that is a BAE/Avro thing) so I doub't you could get anything bigger than a briefcase in there, (The lockers are smaller than those on a Dash 8 Q-300).
Noise wise they were fairly quiet (especially considering I was sat just aft of the engines).
I don't think they are scary, just they all have had reports of fumes over the past few years.
Lifes a train racing towards you, now you can either run away or grab a chair & a beer and watch it come - Phil