Print volume is big: 1 to 100+ cubic metres.
Cost is small: less than US$100.
Speed is slow.
Accuracy is low.
It is a work-in-progress.
The RB3DP can print bigger objects than most other 3D printers. One unusual characteristic is that the print base is triangular. The test prototype was somewhat less than a cubic metre. The second installation was about 5 cubic metres. The design is flexible about the size; it just needs enough string. Not yet tested, but 5 to 8 metres in each direction seems workable and probably even more. Each installation does need to be measured to calibrate the printer.
The DIY cost to make a RB3DP is significantly less than one hundred dollars (USD100), plus 3D printed parts.
@Daren Schwenke found this very up-to-date and relevant publication about cable supports: https://www.researchgate.net/publication/316606621_On_the_effects_of_the_design_of_cable-Driven_robots_on_kinematics_and_dynamics_models_accuracy