As of this writing, there have been three generations of Lenovo Google Assistant-enabled nightstand clocks. This is the original model (#ZA4R0002US) and has several advantages over succeeding generations. For one, it features a touchscreen (as opposed to the "replacement" Essentials model which has an LED screen). Although not a true display (you cannot play videos or place video calls), it does feature a variety of attractive clock faces, pleasing icons, and more "fingertip" controls. It also sports better audio specs than the Essential (which is less expensive). The latest model, dubbed Smart Clock 2, reprises the touchscreen and extends support for the display (by allowing photo feeds and camera streams), but it does not provide a USB port (for charging your phone on the nightstand) without an accompanying dock which adds $20 to the total cost. The Clock 2 is certainly worth a look, but the original is, in my opinion, the better choice (since you'll be asleep most of the time you're using it!).
The only problem with the original however, is that it is out of stock virtually everywhere (including the Lenovo online store). With the new Clock 2, I would not be surprised to see it phased out of production. You can, however, find the original on eBay. However, please be aware. There are unscrupulous sellers who are misrepresenting the original model as "New", when, in fact, they are refurbished. This happened to me, and I did not discover it until it was in hand. I've expressed my displeasure to the seller, but will "release the Kraken" if it proves to be damaged or faulty. Won't know that until my grandson fires it up on Christmas Day. (Shhhh, it's a secret, so don't say anything to him).