Are they a re-badged ecflo or are they completley different.
In reality there are only two mainstream flow controllers that are being sold. The Varistream or the Eco-Flow. Most other brands are actually just a new face-plate on the Eco-Flow, which makes them very popular for re-sellers.
The new Eco-Flow does allow you to work without the pressure switch if you have to have this feature. Talk to your friend Tony about them as he will know more about them.
I have to say that the Eco-Flows are very reliable, we have yet to have a fault with a single one of them.