I have used three of these units, and all three died very, very quickly.
I am a maniac when it comes to gear maintenance, so yes, it was always used with the specified fluids, always cleaned after use. They were transported in a safe padded bag (the few times they actually were transported).
The first one lasted two gigs (the heating element gave up). The replacement one, and the spare one which I ordered just to be safe both lasted lasted ONE gig - as the pumps of both failed - which we discovered during soundcheck (which just doesn't happen statistically, but it did).
Very disappointed. I will try to replace the pumps myself and get something hopefully more reliable.