I think the time has come to get an RO unit. Over the last 14 years, I have been buying water. Started out getting from AC and the last 10 or 12 years I've been using the water from the Publix glacier machines. I'm just getting older and have had some back issues recently so carrying 5 gallon jugs up stairs is getting old. I want something simple. I don't want anything that's permanently hooked up. I want a system I can hook straight to my faucet and put away when not in use. I only use 10 to 15 gallons a week. I've been looking at the Aquatic Life RO buddie. I can get the 3 stage 50 gpd for $60 or 100 gpd for like $63. I don't think the Glacier machine is DI. should I spend the extra and get the 4 stage? Or any other systems that can hook directly to a faucet? Thanks for any info.