Deepuro RO Water Filter System

Update: I've had this system for over 2 years now and I did find a fix for the water pressure issue to the refrigerator. Although it takes away from it being completely tankless, I purchased a very small bladder tank and installed it to the filter outlet hose so that it fills up with just enough water and pressure to make it to the fridge across the kitchen. It also provides some water in the event of a power outage, we will have some filtered water available. Another issue I'm running into (and why I removed a star) is finding the replacement filters for this machine. They seem to be unavailable and the company only sells through Amazon. So, I really wanted to like this machine because I did not like having the tank below my sink along with the astronomical costs of the 5 stage filters from my water filtration company. However, I found that, although this machine does what it says in getting your TDS down below 20, it takes time. Every time I go to use it, the system reads 99 (the readout does not go above 99) on the TDS output and as the water runs through it, the number begins to drop. I've confirmed this with an external TDS meter. The water that initially comes out is well over 100 TDS which is considered too high for drinking standards. In order to get good drinking water, I must run the system for 30-40 seconds each time I use it before I fill up my cup. This is not ideal and I cannot expect my guests to practice this either. Additionally, connecting this to push water to my refrigerator/ice maker, the system does not have the power to push it and it stalls every 3 seconds causing very low water pressure out of the refrigerator. I am not sure if every tankless RO system is like this, but I will be contacting the company even though it is past my return date.