Depends on what you want to do with the machine. It might be OK for something very small, doing light duty work.
Here's a quote from his Kickstarter page:
Imo, 8-10 years ago, this was true. But most of the machines you'll find being built here are way beyond what anyone on Kickstarter is doing.Most DIY CNC machines use bearings on bolts, or drawer slides or other various hardware store concoctions of parts,
It seems like most of the CNC projects on Kickstarter are from people very new to CNC, who are re-learning everything that the members here have learned years ago.