We have moved within the past year to an area that has extermely hard
water. My wife does not like the taste of it or the feel even though I
have installed a water softener. We received a mail solicitation from
a local water products company for an under sink reverse osmosis water
filter system installed for $425.

The company has a good reputation and over 40 years in business with
minor to none BBS complaints.

I don't know if this is a good price or not. For those who have
installed one, is this a good price. What should I expect for ongoing
maintenance supplies (mot price, but what), if any ?

Thanks for any and all replies.