The roof for the cab is a welcome development. The same roof is used for both the pump and the turntable ladder, which is reasonable enough. In fact, the channel in the centre of the cab roof where the extending ladder rests on the TL is needed when mouting a ladder on the pump. The cab roof on this example had two pale red scuffs on it behind the blue lights, presumably from movement in the box after packing. Gently rubbing with T-Cut got rid of these.
Turning to the interior fittings, there are four slide-out trays and two hose reels. However, there is only one hose, which seems a bit odd. Presumably, the need to keep costs down is pressing. The hose reel holders go in the centre topmost space and are held in place by yellow System-X connectors, hence the System-X holes in that compartment. Beware, the order in which you fit things here is important. Fit the yellow connectors in place first, then fit the hose reels to the hose reel holders and then fit these to the yellow connectors. If you fit the holder first and then try and fit the hose reel, you can't do it. Whether you fit the hose before or after doesn't matter, but I found it easier to fit the hose last. The hose is the new, semi-translucent sort which first appeared with the firefighter carry case.
The hose reel itself is the new style with only four depressions, rather than the early style with numerous depressions representing where the hose reel is drilled out for lightness. (The new style is on the left in the third picture and the original is on the right.) I find that the hose reels out much more easily with the old style reel and so I've fitted these in place of those supplied.
Why they chose yellow for the hose reel holders I can't imagine. Why not grey or black, or even stay with red? I've fitted red hose reel holders in place of the yellow ones.
The placing of the hose reels is a weak point of design. They would more realistically be place at the bottom of the rear compartment, but I suppose the need for those strengthening trusses in the top middle meant that you couldn't have a slide-out there so realism was compromised for strength and to maximise storage capacity.