We use it constantly. after using it awhile I became very sensitive to the smell of water directly out of the tap and noticed that smell was gone after filtering in the Aqua Tru. Now I use the filtered water for brushing my teeth too. The only thing that comes to mind about improving it would be that it doesn't hold enough water and I do spend a lot of time refilling and rinsing it out. Also at first I added water to the tank without throwing out the leftover water. So it appears we need to remember that adding fresh water to the tank needs to happen after throwing out the old water left in the tank.
The water pitcher leaks at the spout from the day we got it. We need a bowl under the spout to catch the dripping water. Water taste is great. For the amount you spend this should not be happening. Not happy.
To get a reverse osmosis unit that is so small for counter-top use that doesn't waste a ton of water is awesome. It's quiet and easy to use. The only thing I don't like is that the lid on the back container (the unfiltered container) doesn't come off. It makes it awkward to maneuver into the and out of the sink not sure why it was designed the way it was with the handle inside the lid. Washing out that container is very awkward and it's hard not to bang the lid into the faucet and sink, which worries me that it will break soon. The water tastes like water that has nothing in it. So you do need to add electrolytes/minerals back in.