Huge huge benefits from even a single bank of maxwells. Caps have a very viable place and the problem with the negative connotations has to do with uneducated people on both sides of the equation. Those who say they're useless because of the low farad cheap caps and those who recommend them for their marketing and because they think it makes them look more legit.
The best way to view it is as a slowing down of voltage fluctuations, and a decrease in total voltage drop due to their quick discharge capabilities. Imagine a huge bucket of water with a lot of shaking going on and huge waves all over the place, put it in a lot of boards and when you shake it you still get wave's but they're minimal and less severe.
A $200 used bank of caps will change your life, and they last thousands upon thousands of cycles. I peak at about 450a of draw with 230a of idle charging current and 2 55ah agms. I went from hitting the 10s to almost never going below 13v with nowhere near the same instantaneous drop as before. They work. Physics.