When I first saw this controller, I thought it was a dream come true, and is some ways, it still kind of is. It's full of great ideas, but also flawed execution and lots of technical difficulties.
Looking at this controller, it's fairly obvious its design was based on a mixture of a SNES pad and a Wii U Pro Controller. The packaging touts Wii and Wii U compatibility, but that's actually kind of lie. We'll get to that later. For now, let's talk about the things they did right.
The retro design is just awesome looking, and it's quite accurate. While the d-pad doesn't look exactly like that of a SNES controller, it's close enough. The face buttons are concave, which is a nice touch. Overall the controller is really nice looking, and that's one of the reasons I fell into the trap of purchasing it.
The controller feels good in your hands, and has a decent weight to it. you can reach all the buttons just as easily as on a regular Wii U Pro controller. They all have nice feedback except for the triggers, but that's also true for the Nintendo Pro U.
So, it's pretty, and feels good, and it's allegedly compatible with both the Wii and the Wii U. What could be better? A lot of things. The packaging is extremely deceitful, as it turns out this is not a Wii U controller at all, but simply a Wii controller. The only Wii U games that support the sue of this pad are ones that also support the use of a regular Wii classic controller. So you can't use this with, for example, Monster Hunter or Zombi U, but you can use it with Tekken or Sonic All Stars.
Obviously the main draw of this controller is being able to play virtual console SNES games with it, and for that it does its job...if it doesn't commit suicide in the first 24 hours of owning it, that is.
The controller has a switch on the back with which you can change it from wii remote mode to controller mode. There is a sensor on the top that acts like a Wii remote you aiming and pointing. Ready for possibly the coolest idea ever? If you play a wii game that normally requires a nunchuk, you can use this instead. This may not work well with something like Twilight Princess that requires swinging controls, but it could be really nice for some other games, and I'm sure it'd make a decent Brawl controller.
The controller comes with a USB charge cord, but the battery life is pathetic, and the cord is too short to play it while it's plugged into your console. The technical issues don't stop there. After only owning the controller for around 10 hours, and using it for about 30 minutes, it decided to unsynchronize itself from my Wii U. I resynched them, but then it decided it didn't want to work period, and wouldn't even connect.
I'm extremely disappointed that this controller isn't what it claims to be. It's a Wii controller disguised as a Wii U controller, and even goes as far as to tell you it is a Wii U controller when it isn't. For it's intended purposes, it works very well except for the fact that it broke so quickly. I quick Google search shows that there were many defective products in this line. The Gamestop I purchased this from gave me a refund, and I only paid $25 (it was $40 when it launched). As long as you're comfortable with the fact that it isn't what it claims to be, you could always take a chance and hope you didn't get a broken one. I will personally never trust Interworks again, and this is the first product I have ever bought from them.