It is actually better than the PC in terms of power and build(as of late).
It is a bit closer to
Griot's Garage 6" Random Orbital - Griot's Garage but the harbor vibrates like a ************.
The flex is nothing at all like any of these as it is forced rotation, not free spindles, meaning that the pad spins no matter what kind of pressure you put on it. The flex is the power of a rotary with the safety of a DA, in the hands of a pro where time is money, it is worth its weight in gold. Not to mention it has 95% less vibration than any free spindle.
IMHO, the HF is a good value, don't expect it to last too long with serious use, extended warranty is ok. The Griot's has a great warranty and comes with extra brushes. The PC, is a crap shoot, they aren't bad per say....but they are a massive company with a massive product line. I would actually recommend the griot's, then move up to a flex/rupes. Cyclos are great, just not for me..