Yes. It works extremely well. It has two specialized membranes to get a high flow rate. It removes arsenic 5 very well but not arsenic 3 very well.
Merlin data sheet with info on the arsenic removal:
http://www.ge-merlin.co.uk/MerlinPerfData.pdf
Where you can buy the Merlin:
http://www.waterfilters.net/GE-Merlin-Tankless-Reverse-Osmosis-System_p_0-1467.html
If you need better arsenic 3 reduction:
http://www.waterfilters.net/Arsenic-Reduction-Water-System-AS-301E_p_0-579.html http://www.waterfilters.net/PDF/Filter-Housings/US-AS-RO-Systems.pdf
Thank you,
WaterFilters.NET