Well, My HF Impulse Sealer arrived and I gave it s shot. Using the 7mil LDS bags, I had some major difficulty. First off, the timer seemed to be faulty. The longest I was able to get the timer/heat to operate was no longer that 3-4 seconds. For the 7 mil bags, it did not seem to be adequate. I called for a return label. Their customer service dept, (overseas) was helpful an emailed a return FedEx label within minutes. I switched back to my iron and aluminum carpenters level. Until I see one that looks good and can seal wider than 1/8th inch, I will continue to use my iron. Thanks!