Product review (5 stars): Better than I expected!
I was very hesitant to buy an off-brand controller (especially a $7 one) because I hear they don't work as well, but since the official nintendo wii controllers are SO EFFING EXPENSIVE I took a chance on this Nyko one. After all, we just needed a spare in case we happen to have a 3rd player around, which isn't often.

I was pleasantly surprised! It actually works just as well as the official wii remote! Also, it came with batteries, a silicone case and wrist strap to match it, which was a nice surprise since it didn't say in the description that it came with anything. That's a lot for $7!!!!

Key differences between this and the actual nintendo brand wii remote: The Nyko is slightly clunkier and a little heavier, and the buttons are a little bigger. It makes no change in gameplay, though. If anything, the bigger buttons make it a little more user-friendly for certain games. As a side note, some of the sleeves and skins that are designed for the "real" nintendo wii conrollers won't fit on this due to the difference in button size. (But no worries since it comes with a skin and wrist strap already!)

People have said that they had a hard time syncing the remote to the wii, but I haven't had any trouble.

BE ADVISED! THIS DOES NOT INCLUDE BUILT IN MOTION PLUS! But it is compatible with the motion plus adapters.

I really like the bright color, and as far as off brands go, I definitely recommend this one! We've had it for several months now and so far no complaints!

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UPDATE 10/14/14:
I still have my two yellow Nyko controllers over a year later. They are still alive and well even with pretty regular use on both the Wii and Wii U. As a whole, I'm pretty impressed with Nyko products. I've purchased other Nyko products as well and have had no issue.