I have been using nikon D40 since 2015 and had a great experience with nikon .
D40 Comes in very handy shape with grip with makes handelling more safe while you are shooting in hights it dicrease the risk of falling
Picture quality of D40 is really awesome both in sunlight and night
Battery comes with nikon d40 is having long life line one month ago I was on a tour of veshnodevi( katra) with family it take 19 hour of whole day and captured near about 500 pics in a day and was able to take 1000 pics with remaining battery . and it does not take much time to be recharged
As it have only 3 focus points it reduces the areas of uses