How fast is your RO system?

I've been checking these out online today, and it appears that speed is the limiting factor - I've read anywhere from 30-90 minutes per gallon (30 from manufacturer, 90 from a user review). Splitting the difference, that's 1 hour per gallon. I'm not sure I want to wait 6 hours for my "mixing res" to fill up. That's valuable kitchen sink time for a family household.

Is that pretty much a consequence you accept with an RO system? Ideas for how to make this less of a PITA?

I must say, the appeal of using one for cooking and ice is pretty nice, though. The fridge carbon filter only knocks out about 10% of the TDS, according to my meter. Not terribly surprising.

Mine will make 2 gal in 30 min but the second one will be very slow. it depends on the tank you have. You can get a larger pressure tank so that you always have say, 5 gal in reserve. Another thing - I have mine in a utility room not in the kitchen. I then got a 3 gal countertop water holder with valve to keepin the kitchen.

you can get rated up to 100 GPD. Mine puts out about 50 per day.

membranes are relatively cheap

If you want high volume check out the GE Merlin. That thing can support a huge grow. Over 500 gallons per day for about $400 if I'm not mistaken. I use a 100gpd and it does about 70-75gpd for me. It does a damn good job by taking my water from 280ppm from the tap to 8ppm in my holding tank. I think a lot depends on how good your water pressure is. You'll get more and better quality water with higher pressure.

mine will do 1 gallon every five minutes. what i found is adding a booster pump makes all the difference in the world with these home units.

This is the best filter and price I had found...
http://www.bulkreefsupply.com/store/products/reverse-osmosis-filters-and-systems/reverses-osmosis-deionization-systems/standard-ro-di-systems

1 Gallon every 25 minutes.