Basically, the biggest concern is that they actually test nozzles. Everyone "says" they do, but I open a box and find the injectors filled with extrude-hone fluid, and I know they lied about it.
Your engine can be turned up just so far before it breaks. The "weak link" cylinder will fail first. Some extrude honed injectors are over 20% different from nozzle to nozzle, so basically you're going to blow up at far less power than with balanced injectors.
Don't trust their claims, request a real datasheet on flow, that goes to at least 160mpa.