This is the ultimate all-in-one lens for FX camera users. It's also quite usable on DX cameras, though the DX 18-200mm (on which this is obviously based) might be a better choice of focal length range for DX users.

It's sharp at all focal lengths, and although it's big it handles well. Reviewers have noted that it suffers from significant distortion (barrel distortion at wide angles, pincushion distortion at telephoto lengths), so it's probably not the ideal lens for you if you like photographing brick walls; but in the real world that's not a major issue and it's readily fixable in software.

If you want a one-lens go-everywhere do-anything solution, this is it.