Same here. But it's out the question to use a cable when this thing has wireless. The wii had no problems.
Yeah, agree with you there but when the wireless dosen`t work properly then cable it`s better then nothing. Never had any problems with the WII either.
I had the same problem, kept loosing the connection all the time, even if i placed the WII U right beside the router..tried everything, but nothing helped, my PS3 and Xbox360 and iPad works just fine so there is no problem with my wireless router.
Bought a Ethernet Adapter just to se if using a cable would help and it did...works as charm no but dont know if it would solve your problem.