I plan on using them, and bought one for testing before buying the 3 I need.
The drive blew immediately when I fist powered it up. DMM repaired it for free, saying it was due to over voltage. They claim the drive is rated for 240V + 10%, but my voltage is about 245V.
I plan on using a transformer to lower the voltage down to 220V, and to also use a line reactor as specified in the application note they sent me, attached below.
My opinion is that an AC servo is actually much more powerful than the Clearpaths, as they have more torque at higher rpm.
And the DMM's are actually cheaper than the Clearpaths, and about 25%-35% cheaper than other AC servos.