I've had a Surface 2 since released day, and am very happy with it.
There were some early firmware and OS issues, but these were fairly minor and have since been largely resolved by updates. Microsoft have proved very good at establishing a steady monthly trickle of updates and improvements, which mean month by month, the product keeps getting steadily better and better.
From my experience, and from keeping my 'ear to the ground' I know of no fundamental issues with the product, such as hardware design flaws, or other issues that would typically result in a recall. I'd say if you're looking to buy a Surface 2, you can do so with confidence.