4 stars: The app is a bit sluggish but the local info is very useful. {Edit} Based on the response from the Nextdoor team, in fairness, they are correct: it isn't the app that is sluggish, it's the serving of content from the server. This leads to pauses and jumps when scrolling through posts. If the server responded more quickly and with lower latency, the app experience would be even better.
3 stars: Great concept. Email notifications allow you to click on them to take you to the app, but the same item you clicked on in email doesn't take you to that post every time unless (and only sometimes) you already have the app open before you click the link in the email.
2 stars: Pretty good app. I like keeping up with what's going on in the neighborhood. I seem to get a lot of stuff from other neighborhoods even though I have narrowed my settings. Links don't always take you where you expect to go. I get notices in my email but the view button invariably takes me to an ad rather than the post. Using view 2nd time gets the post. Seems deliberate.
2 stars: Notification issues. I tap on a notification of a post, and it just opens the app. Doesn't take you to the post. Never ever. Sometimes posts are deleted, but most of the time I have to type in keywords I saw in the notification into the apps search and I find it half the time. The search is rough and doesn't find stuff that exists sometimes. But I mostly am tired of notifications not working right. 100% fails every time...