i have a Primus 65 litre Mammoth dual zone. they are EXACTLY the same unit as the ironman, and when i say exactly the same i mean i was kicking myself when i bought the primus as the ironman one was $180 cheaper. anyway we'vw had ours for about 2 years and it has been faultless, freezing works well, seems to have a fairly low current draw, no complaints from us