Yup, I have one. It's pretty great, despite there not being many good games right now. Most people are either getting SSF4, Rayman, or Pilotwings. I only have SSF4, but it's pretty good.
As for errors, the 3D effect, etc. I haven't had any problems with my 3DS yet, and the 3D effect is pretty cool. It's not the greatest thing ever, but it's still cool.