I'm considering getting the HydraFacial machine from Edge Systems. I know that they have a few models available in different price points, but haven't decided which would be the best investment, yet.  Has anyone used it, or currently own one, if so what do you think of it?  Better / worse than other microderm machines? Ease of use?  How have your clients responded to it?  Would you use / purchase it again?  I would greatly appreciate any thoughts or recommendations on this.  Thanks in advance!