Has anyone on here ever used the Link Atom standalone ECU?
 

I was catching up on the Speed Academy RA24 build on YouTube, and they ended up with a standalone system that I've never heard of before. I found this kit from a company in NZ:
Link G4+ Atom II Easy Wire Package - Mazda 12A / 13B N.A. Engine Specific - NZEFI - Performance Tuning and Development

The kit looks pretty sweet, but I'm just wondering if anyone on here has ever used even just the ECU and could give me feedback on what they thought about the system, how easy or difficult it was to tune it, or if they've had any issues with it so far? Any input would be appreciated, thank you!