With the digital varistream, I've got to charge my battery up overnight. I have a split charge relay, but not wired it up; but it's no problem to me to unload the battery while the van is filling up for the next day.
If I don't charge the battery up, I also get a flashing "L", eventually followed by a "U" and it turns the pump off. It's annoying because it doesn't do that with my cleaning warehouse flow controller.
However, when working by myself, I do prefer the varistream controller. It turns off just by pressing the button, rather than the cleaning warehouse one which makes me 'press and hold' for a second. I calculate that over the course of the year I waste 3 minutes 47 seconds just stood there 'pressing and holding'. Flippin' frustrating that is.