I have been using quite many different set-ups regarding racks during the years. Off course you will always choose the rack case with consideration taken to what you will keep in it, that will for sure influence if you go for a Rockbag or not.
Since some 5 years back I been using my rack solely for effects/processors and cables and my conclusion has been that the Rockbag does the job best for this kind on content, the reasons are:
-Save space compared to traditional rack (i.e. no cover/lids to handle when in use)
-Easy to carry with handles and shoulder strap
-Light in comparision to traditional racks
-Both hands are not occupied when transporting (i.e. a guitar can be carried at the same time)
In my case I currently have the following in the RB24410B:
-Sennheiser IEM W300
-Line6 Relay G90
-Fractal Audio Axe-Fx II
-6m of cables to the mixer (microphone, 240V power, left guitar, right guitar and InEar)
-7.5m of cable to the stage position (midi, microphone, power to pedal)
All this fits in the RB24410B!
The only disadvatage notices so far, the fixation for the shoulder strap to the rack could be a bit more robust.