UPDATE:
We installed our U by Moen smart faucet on Monday, and here is our experience. We did struggle removing the old Delta Leland faucet, but installing the new U by Moen Arbor was a breeze. Alexa setup mostly went without issue, although it took a while for the faucet to calibrate to our house to calculate the minimum and maximum temperatures (we might have to recalibrate in the winter). The Alexa commands seem to work well, and we haven't had any issues with the faucet losing connection. It can either be controlled via Alexa, via the motion sensor, or manually. There is a little indicator LED on the top that indicates the temperature going from cold blue, to purple, to pink, to red hot. We are quite happy with it and we would recommend it.
Now one thing that seems to be somewhat bothering me is that the finish on our Delta soap dispenser doesn't exactly match our new faucet. I think our soap dispenser and our old Delta Leland faucet are Arctic Stainless, while our new U by Moen Arbor faucet is Spot-Resist Stainless. Arctic Stainless is a more glossy, cooler finish, while Spot-Resist Stainless is a less glossy, warmer finish. I think Delta's closest finish to Moen's Spot-Resist Stainless is their SpotShield Stainless, while Moen does not have an equivalent to Arctic Stainless. Since these soap dispensers are $40+, I don't think it is worth changing just to match the finish.