I got one early this year. It has sat at 20 degrees C though the winter which is not bad, but I am looking forward to seeing it climb up to hotter temperatures.
I've used leachate on established pot grown plants (olive, Szechuan pepper bush), spinach and strawberries growing in containers, plus on overwintered auricula primroses and violas. So far everything has loved it. The leaves seem to green up really well and the auriculas and violas are flowering their hearts out.
I would use it on anything you want to give a boost to. It seems pretty potent stuff