I would like to get some real reviews also. All I've ever heard is hearsay from people who don't own them. You should note that the spindle you linked requires 800hz to reach max speed. That is twice what the average vfd used for regular Chinese spindles put out. The ones from automation technologies only require 400hz but cost 400 or so more. I'm sure someone else sells 400hz versions direct from china but you really have to look around.
Ben