I have used mine to recondition a small UPS 12V battery, without any hassles.
Using a relatively expensive and sophisticated power supply to charge car batteries doesn't make much sense to me, when proper sturdy battery chargers are available at a fraction of the cost.
There may be some design flaws, but mine has worked as advertised, so far.
I also own a small linear power supply, which I built myself, for use with noise and voltage sensitive circuits.