I have used Culligan for many years. They have been extremely reliable and their prices are good. We also own an RV park on the lake. They come every fall, service the two units and winterize them to take off line till we turn the water back on in April. In April they come and put them on line, fill them with salt and check them out. They always show up on time and are courteous and efficient.
We are very pleased with the "exchange tanks" for our soft water needs at our lake cottage in the summer. We have very little space in our utility room, so these work perfectly. I also want to make a loud "shout out" to our delivery man, Aaron. He is the best and we always enjoy our conversations when he delivers our tanks.
They do a good job about taking care of my softener and my purified water but since I'm retired now and their prices keep going up I may have to just drop them and take care of things myself last time they changed my filters on my purified water it was over $300 and I think that's a little too much