Waterdrop Water Filter System (Open Box)

I've had this for nearly a year. I wanted to wait this long because you never know how long an electric pump might last. The machine is still going strong. Water taste is good. I can definitely tell its removing hard water, chlorine, etc. even better than good fridge filters. I chose this because standard RO systems that hook up to your sink usually have large 5 gallon tank. With the plumbing the way it is under my sink the tank doesn't fit.PROS1. The unit has UV light for killing viruses. This is actually something you don't get with traditional setup.2. The taste is pretty good. I usually drink water from fridge which has good filters. I use the RO water for tea and coffee where hard water stains would buildup.3. The digital TDS reading is another nice-to-have.4. The rubber feet are amazing if you need something that doesn't slide around. I put it on sliding pad so I can easily turn it around to refill the tank. That allows me to tuck it way back under cabinets.5. Easy setup. Insert filter, plug it in, fill water tank.CONS1. Sometimes it doesn't fill the correct number of ounces. It's rare. I'm talking about after flushing routines and when the internal reservoir had time to fill.Suggestions for improvement1. The common 4, 8, 16, 32 oz options are mostly good enough. My morning routine is 24 oz coffee though. I have to use the 8 oz then cycle to the 16 oz after to get the amount I want. Minor inconvenience but it can definitely can be improved with a numpad so I can select exact desired amount.2. I'd like to see a front removable water tank so I don't have to spin it around to fill.