Yes. We were on the Journey in March this year.
After going on many cruises before and practically taking an extra suitcase to fit all the family's formal clothes in, no formal nights on board is great! It's a nice break from your typical cruise. After a while you've been there done that and bought the t-shirt! For guys a nice pair of trousers and a polo shirt and ladies a simple dress, skirt or pant is quite acceptable.