An excellent rack! These come with or without pop-up mixer shelves. I have the pop up and I have also put this on casters - available from Thomann (with fixings - took about 20 minutes to drill and screw).
It's extremely sturdy and still fairly light. The service hatch is plastic, but this is fine - and has enough room to fit maybe 3x 4pole speakon or two std speakon and 4x XLR cables through the back. The top can be removed without taking off the front panel and the depth is plenty for most applications.
I have fitted a mackie mixer, Focusrite saffire pro 40, 2U Digital EQ, PA Amp and 1U compressor/gate/limiters (x4). For me, this rack and kit is ideal for monitors or for FOH PA on small events/gigs.
It also includes the newer (quite old now) style rack-mount screws (the ones which sit in the rail and you can simply move up and down until they are in the right place) on the mixer top and a massive bag of standard rack-mounts for the front section.
All in all an excellent case!