I have used both, along with Southwire.
My current unit is a Hughes Power Watchdog. They have a Gen 2 coming out shortly that has WiFi in addition to the Bluetooth connection. One thing I like about the Hughes unit is that the surge suppressor module is replaceable. It is less than $50 if you take a hit that fries it. For the others, you have to replace the entire unit.
When the Gen2 hits the market I will have a Gen 1 up for sale.
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(or a spare).
I haven't run into a case where I have needed the Autoformer. We spent a week in a state park that was having power feed issues where it kept browning out. We just ran the generator for a few days, our EMS/EPO would kick the power out and we would start the generator. If we were staying somewhere long-term and the power brownouts were common I would consider the Autoformer.
Aaron