As its name goes Queen Of Hills . it is .beautiful weather pleasing you all round the year and amazing veiws of Dehradhun valley on one side and himalayan Range on the other side.
it is easily accessible from Delhi and Ncr . You can travel by your own car or take a taxi as the roads are beautiful till the end point .
There are variety of hotels of avaialble as per your range . but book in advance as you might not be able to get one of your choice .
local sights are Gardens , Mall Road , Ropeway . zoo etc or you can visit Kempty falls .
overall its a good place to visit for 2-3 days outing