The last two months have been a roller coaster ride

[alpacinou]

Is this correct and natural?

The last two months have been a wild roller coaster ride for Jane to say the least. A constellation of conflicting emotions rocked her. She explored the deepest valleys of despair, the highest peaks of joy and the stagnant waters of apathy.

 

[Charlie Bernstein]

Is this correct and natural?

The last two months have been a wild roller coaster ride for Jane, to say the least. A constellation of conflicting emotions rocked her. She explored the deepest valleys of despair, the highest peaks of joy and the stagnant waters of apathy.

Without that comma, the purpose of the roller coaster ride is for Jane to say the least.

Back to comma camp!