skip the VR on wide angle lenses (18-55). The rule with good technique is you can hand-hold shutter speeds down to 1/focal length. So, if you are shooting at 18mm, you can hand-hold down to 1/18 sec on the shutter speed, and likely get a good result, if you have good technique. So, that's a pretty slow shutter speed, very little need for VR.
However, for a 200mm focal length, you need to be around 1/200 sec to avoid blur. You will have a hard time with that indoors, early morning / late day light. So, the VR is more useful in the longer ranges.
Downsides? Battery drain, slower focus, heavy, more complex. Image-wise, there's no real downside. VR can be turned off on the Nikon lenses I have.
1999 e46 328i Ti Silver / Black[retired]
2007 e90 335xi Jet Black / Black[retired]
2011 e70 X5 35d Vermillion Red / Cinnamon
2011 e92 M3 LeMans / Fox Red extended