Characteristics:
Stronger and quieter
Easier to maintain and adjust
Use as many original parts as possible (no need to change a new RAMBo cover nor change any cable, rods or firmware)
Compatible with MK2, MK2s, MK2.5 and MK3
Very detailed manual
Use more aluminum and fewer printed parts (3D printed parts can crack and are less reliable)
Use Openbuilds hardware:
Single platform of multiple compatible hardware components
V-Slot offer more options for printed parts and customization than T-Slot
Open source with powerful community
Easy to square and build
Worldwide shipping plus several other stores sell these parts
Other type of aluminum profiles can be supported thanks to parametric design (check Fusion 360 files)
3D printed parts designed using advanced techniques such as selective infill, clean vertical holes, sharp angle ...
Open source by STL, STAP and Autodesk Fusion 360 files
Z engines can be easily removed for maintenance
Fix some dimensional errors of z-axis from Original Prusa i3
The kit contains what is in the BOM:
V slots 1x331mm + 331mm + 290mm, 2x359mm + 370mm
Tee-nuts M5-31x
M5*30-16x
M5 spring pad-16x
M5x8mm low profile screw-4x
M5x10mm low profile screw-17x
M5x12mm low profile screw-14x
Self Tapping Screw M5 - 4x
Set screw 4mm M5 - 8x
M3x12mm socket head screw (hex) - 10x
Zip ties 2.5x100mm -20x