Yeah its a great deal on the RODI unit I'd jump on that if I didn't already have one. The Refractometer isn't bad either hardcase and calibration fluid so its a better deal then the ebay ones which I currently use.
Today they added a 2 part doser for $50, and dual inline tds meter for $20.
I'm thinking about jumping on the doser, my current kalk setup is pretty ghetto.