Yes, it is worth playing.
But 1 1/2 decks cutoff is borderline. 1 3/4 deck cutoff = don't play.
Watch carefully, maybe you can selectively play when their is 1 1/4 cutoff if this varies.
Also leaving when the count goes below -2 TC, only entering the game when the TC is +2, (or both), will improve your results.
You might get better answers if you gave your total bankroll, what type of minimum/max bets you are comfortable with, how much tolerance you think the pit would have to a large spread, and what risk level of going broke you want to be playing with.
Or you could spend a chip or two on a book called "Blackjack Attack" by Don Schlesinger, Chapter 10 of the book has charts which will give you the exact type of answers you are looking for.