Note: Requires two (2) AA batteries (not included) to power controller.
For the price, it's really good! The official Wavebird is the superior controller in terms of feel and build quality, but not too budget-friendly. I grabbed one of these as a spare when friends play, haven't had any complaints when anyone used it, and have no issues with latency/disconnects. If you're looking for a wireless cube controller on a budget, this is a great choice.
I recently purchased a Gamecube with no controllers included. This is the second controller I went with and it is an alright option. If you are looking for an expensive Wavebird on other sites and want a cheaper solution go with this controller. The only downside to this controller in my opinion is the small left thumbstick it just feels small and weird. All in all the controller is responsive, solid rumble, and no cables is awesome. I have been using it for a month now and I've had no issues. I recommend this controller if you want to save some money instead of going with an expensive Wavebird.