I have an order for the batteries right now. The shipment is due any day, to arrive on the W. Coast, then it'll be a while to get here due to customs and trucking. Hopefully in a couple weeks, in other words.
I bought them through the co. you mention. This is my first dealing with them. They have been quite professional, helpful, and have done everything they've said they would exactly on the schedule they promised. The only contacts I've had from them have been occasional updates about my order, which, coming from China, has had some delays due to China stuff and not BeUtilityFree. They've called a couple times, e-mailed a couple times with updates and twice to answer questions I had e-mailed to them.
So, I've had the opposite experience from Ross's. As I said, this is my first dealing with them, but the experience has been positive and professional. As to the Ni Fe batteries, I cannot say more til I receive them. The change-over from my lead-acid bank will take a few days, or so I anticipate. It is very hot right now, and I need to try to minimize my electrical downtime to protect my fridge and freezer stores and other electrical needs. Meaning, it may be a little while before I have much info' gleaned from my actual Ni Fe battery experience. But, I am excited to be receiving them....