If you are thinking of buying this lens as a 'fit and forget' dont!!
However, if you are looking for a good quality high power zoom lens, this is it, the focus is quiet, quick and sharp, it has a nice comfortable, chunky and well built feel to it, my experience of it so far is very positive, it is far superior to the Nikon 18-200mm which I already own.
All the pictures of it on Amazon make it look a similar size to the Nikon 18-200mm, which is initially what attracted me, thinking of it as a more powerful 'fit and forget' however it is in fact bigger and heavier, enough to make it uncomfortable hanging from your neck all day long.
To be honest I am still not really sure that the extra 100mm over my 18-200 is that useful, I shall probably have to wait for an airshow to really judge that one.
If you are looking for a fit and forget, the Nikon 16-85mm is a really nice lens of similar quality to the 28-300mm, but of course smaller and more manageable.
The ideal scenario is the Nikon 16-85 on the camera all the time with the 28-300 in the bag for those times when you want a more powerful zoom.
The most economic scenario is the Nikon 18-200mm which is still a very nice lens and has been my main lens for a few years.