We love the TA's loads of ship time and no rushing to get up and off the ship.
Some activities like aerobics, spinning, martini tasting, wine tasting. some lectures, computer classes may also be chargeable, plenty of free things to do.
One thing to watch out for is that you have a 5hr time differnce so there will be 5 23hr days on the crossing, on our RCI TA the capatain decided to do this at midday, so one hour less for lunch and activities normally this is done overnight so one hour less sleep.
Tuxes will be worn but smart casual is still ok if you don't want to bother carying the posh stuff.
Make use of the outdoor areas early in the trip it can get a bit colder as you head north.
We were on Navigator and the decent drafty beer ran out after 4 days so ask how much they have and get drinking early if supplies are low.
Not been on RCI for over a year so cannot comment on prices
Check the dailies carefully for things that are on, take a highlighter.