I've replaced the XiaoYi with XiaoFang, and XiaoFang is smaller, more adjustable, 1080P and no restriction on firmware updates. Angle is wider too. Only gripe is the colour looks darker.
You can even buy accompanying sticker for XiaoFang, and now my camera looks like Mike from Monster Inc, great for a kid's room.
Some of the features I liked from XiaoYi is missing from XiaoFang,
1.) Fast connection to XiaoYi but I've encountered authentication loop when connecting to XiaoFang, must restart the camera before it will work again, very inconvenient.
2.) XiaoYi records motion only video while XiaoFang is continous recording, I like the interface of XiaoYi, can't say the same for XiaoFang.
3.) Video seems to be more crisp for XiaoYi even though its only 720p and XiaoFang is 1080!