That sucks there's problems. What kind of issues are happening?
Bolsters basically covered it all.
Here are my qualms specifically:
•No way to charge joycons and play on your TV screen simultaneously. This is gun-in-the-fucking-mouth-inducingly dumb. That controller-type thing you can slide the joycons into has no charging capabilities whatsoever but Nintendo (with drool coming from their greedy mouths) will gladly sell you a virtually identical version of that controller shell that has charging capabilities for the low, low price of $30.
Otherwise, you'll have to charge them connected to the tablet portion and plug that fucker into the wall and obviously this isn't the Wii U so you have to choose between playing it on the tablet or on your TV screen, not both.
•The wifi fucking blows. This thing hasn't been able to recognize my house's wifi from my bedroom once while at the same time my Wii U, PS3, PS4, 3DS, home theater, phone, and laptop all can. I literally have to walk to the room where the router is in order to do anything involving internet access.
•The buttons are as small as 3DS buttons. If you don't regularly play portables with small buttons, the buttons may feel off-puttingly small to you. They definitely do to me.
•No D-Pad and until a third party releases a pro controller you can only get a D-pad by shelling out ~$75 after tax for a pro controller. For younger gamers whom never lived during the pre-N64 era, this probably won't matter but for older gamers this might really suck when you're playing a 2D platformer.