IR needs line of sight, or something to bounce off. No feedback either that your command has actually worked, unless you have another IR transmitter in the device and a receiver in the remote.
These will be a godsend for people who like to stick them up trees, on the sides of cars, pretty much anywhere that isn’t a bike or helmet. I like that you get a copy of the info display on the remote so you can change settings without needing to grab the camera. Once they get the smartphone apps out for video preview it’ll be awesome. Likewise for the more serious users, controlling up to 50 cameras at a time is fantastic.