Over the years, I've had an occasional need for a security camera to watch over my house. I've checked out a few cameras, but found that the inexpensive units on the market were really no more than toys that weren't suited for 24/7 deployment. But times change.
Low cost; 802.11n wireless; Good quality video; including low light; Audio monitoring
A few quirks; Recording not built in; Motion detection setup can be finicky; No MacOS setup or mgmt / recording support