Save your money , buy something else for your gym.
Not an "expert", but there are so many other things to try to boost your bench. Floor press, rack presses, board presses, lock outs, etc.. If you are benching at home try all these things ( one at a time). Do a heavy day , rack work then some reps. Do a second day lighter or DB work for the bottom. So many options. Pick something,run it 12weeks and see what happens.