It is nice to see a new alternative offer here! It is definitively a price breaker! I dont like that it has 2 Parts who are mounted togehter - but - for this price i suggest to try it.
The competitors with the same style are: Twine hot Water, and the Helton Hot Water devices.
I have the Helton device, and happy with it. To be honest - i do only use the heatexchanger out of the package - i have builtin a Surfflo Pump and so on.
Google will help you, to find more informations about all offers.
The Phirana Device seem to have a much better pump and accessories - the helton and twine ones are really cheap. Please keep us updated - what you buy!
Surfy