I initially bought this product for my vacation home because it offered off-site remote management of the lock via the internet without having to pay for a subscription service, which was a BIG positive. I didn't have any other Nest products installed before purchasing and installing this lock.
Pros: Home Depot delivered this product on time as promised. Installing this lock was very easy and straight forward. I was replacing an existing deadbolt lock. I was able to do it on my own with a screw gun. The instructions included in the box and on the internet were easy to follow. Setting up a Nest account, entering new lock codes and managing access was also easy to figure out.
Cons: Every time my internet connection would drop, the lock would go offline and wouldn't reconnect. There is no information online or included with the lock as to what the lights mean on the Nest Connect. I spent over an hour on chat with Nest Tech Support trying to figure out how to reconnect the Lock & Connect to the internet. It was determined that I had to unplug the Connect and reboot it by pressing the button at the bottom and then plug it back in. When the green light is lit on the Connect, it is communicating with the lock. When it is blinking yellow, it doesn't have power. There doesn't seem to be any indicator for when the Connect isn't communicating with the wifi. I deduced that the Connect appears to be missing a piece of software that tells it to try to reconnect with the wifi every so often. This is such a new product for Nest, I'm not sure that their Tech Support knows the answer to that question.
The same day I came to that conclusion, I happened to install one Nest Protect Smoke and CO2 detector. After I installed the Nest Protect, the lock and Connect no longer had any trouble re-connecting to the internet after it dropped. My assumption is that the Nest Protect has that little piece of software in it that the Nest Connect is missing. Since all the Nest products communicate with each other, the Protect product seems to be assisting the Connect product. I have since added the Nest Hello Door Bell.
In conclusion, as a stand alone product for a 2nd home or vacation home that you do not have regular access to, I wouldn't recommend the lock due to it's inability to reliably reconnect to the internet. However, if you add it to an existing Nest system, or add at least one Nest Protect, then you have a really slick and easy lock management system that we have been very pleased with since we installed it 2 weeks ago.