I recently bought a Flashforge Creator 3. The only disappointment I have is that it has no USB interface - so it isn't possible to converse with the firmware to list/set parameters.
The only way to converse with the printer interactively is via the control panel provided by Flashprint. However that interface only provides limited functionality provided with the GUI - so full conversion with the firmware isn't possible.
Whilst Flashprint broadly provides acceptable print quality it sucks big time as there is no option provided to provide GCODE enhancements when starting, finishing or changing extruder - you get what is provided with Flashprint. So when the print finishes it parks the nozzles but leaves the Z height wherever it was. If I had control of the GCODE I'd move Z to the lowest physical possible position ready to remove the print.
With respect to accessories there is no glass bed, and bed coating options for the flexible bed are limited to the paper sticky surface provided by Flashforge. However the BIQU Spring Steel 310×310mm and similar beds are magnetic and work well - without sacrificing print area. These fit nicely into the printer without modification:
https://www.amazon.co.uk/gp/product/B089LSRXKB
https://www.amazon.co.uk/gp/product/B097RBJ3YR
As a long time user of Simplify3D I miss the interactive and GCODE options usually provided - does anyone know of a utility for conversing directly with the Creator 3 firmware?
Alternatively, would the folks at Simplify3D please consider whether extra options could be provided for communicating with a printer thru an ethernet port.