[m22mike]

Lynn
I put in a GE undersink system I got from the orange box store about 5 years ago. Works well. Used for drinking and coffee water, our well water is very hard and has iron bacteria a common problem in the mid west.
I can pull off a gallon in less that a minute and then it gets slow. They advertise a couple gallons but that is not the realistic. I think your well tank pressure has allot to do with it.
I installed mine in the basement below the sink area, had to extend the tubing but it works OK.

Mike