Do you have any complaints with your smart ATO? Also what are your opinions on the Seneye monitors? Those look very interesting!
On the ATO I love it I have a 3gal pail that I put fresh water in with some 8.3 ph neutral in it . My salinity and other elements stay very consistent. The one down side to this one I have is there is a plastic piece you put on the water line to break the suction and it often leaks so you need to have that over the tank or you get a mess. The 3gal bucket last a week or two for me.
As for Seneye I have two of them and I do love them. I find they are good at giving you a quick know as to what your tank is doing but I still like to run test every week or two. The biggest down side besides the $10 per slide is the fact it is not WIFI built in. You either have to buy their part or have it connected to a computer to get readings online. You can just plug it in and the slide stores your reading till you attach it to the PC.

