Is the Nikkor 18-200 a step up from the Nikkor 18-55 and 55-200 VR 1?

Do you get a lot of distortion? Is it a good idea
Or should I get different lenses?
For a Nikon d7100 body:)
Thanks

Read more: Is the Nikkor 18-200 a step up from the Nikkor 18-55 and 55-200 VR 1?