I totally recommend you to go in this tour. It happens at least twice a day and it is supposed to last one hour, although it usually takes a bit more. All the guides I’ve had are amazing and they will explain you different objects of the Museum. You’ll learn about 6 or 7 things walking all around it: paintings, statues and even architecture!
Everytime is different, so you should definitely do it more than once.
Finally, if you want some tips for your visit to this amazing Museum, take a look at my other post: Tips when visiting the MET.
As always, any question you may have, please feel free to ask.