I purchased the Gen 2 Nest Doorbell (wired) to replace the original Nest Hello Doorbell (also wired) for a few key reasons. The Nest Hello developed some serious lag over the years...when someone was at the door and rang the doorbell, the video would fail to load through the Nest app. This was really annoying. Secondly, you needed the Nest Aware subscription ($6 per month) for most the features...video recording, face recognition, package recognition, etc. Without the Nest Aware subscription, the Nest Hello was severely limited. Despite that, the Nest App was decent, no complaints. I had the Nest Hello for over 5 years just outside my front door, and it never failed on any given day, even in subzero temps during mid-Winter.The Gen 2 doorbell installation was nearly identical to the Nest Hello installation. The only difference was the chime module was slightly easier to install (somewhat less wiring on the Gen 2 model), otherwise it was an easy swap. If you're replacing the Nest Hello, as I did, you WILL need to swap out your doorbell chime module for the new one. The rest of the wiring is the same. Video quality on the Gen 2 is slightly better than the Hello, but not substantially better. The most significant benefit of the Gen 2 is you get many of the Nest Aware features without the need for the subscription...face/package recognition and the ability to record and review "events." Video history is fairly short however...events such as package deliveries and people only remain available to view for a few hours before being removed. Also note that the wired model does not have a battery, so it will not function during a power outage. Unlike the Nest Hello, however, the Nest Gen 2 will function and record video during an Internet outage.What you lose with the Gen 2 Nest doorbell is the Nest app is gone, and so is email notification. The only way to access/configure the doorbell is through the Google Home app. The Google Home app seems more limited than the Nest app, and the video frame is quite small within the Google Home app. If you have Google Home displays (including Google Home compatible smart clocks) within your household, video from the Nest doorbell will pop up on those screens whenever someone rings the doorbell. The Nest Hello did the same...however, as I mentioned previously, the Nest Hello was so laggy that video would fail to load when the doorbell was rung. The Gen 2 is much more responsive and snappier than the Hello, as it should be considering it's the latest and greatest. It would've been nice if the Gen 2 had a wider viewing angle, and a 16:9 frame vs a 4:3. Some may be disappointed with the video quality, considering there are $25 plug-in cameras that provide higher res video in addition to many more features for motion detection, etc. compared to the Nest doorbell which costs over $150.Overall Nest Doorbell Gen 2 (wired) is a good product...great for knowing who's at your door before you answer it, and a fairly effective theft-deterrent. Installation is not difficult and clearly explained on the website provided within the product documentation. Loses a star because the Google Home app lacks features and seems immature but it does provide great person/package recognition and the basic functions you'd expect from a fairly pricey doorbell camera.