2 days ago I was parked next to a guy with a complete Banks System on a 2008 V10 F53 (362HP). Because this question comes up often, I had a conversation with my neighbor. He bought the coach new, drove it for 6 months and then installed the Banks Power Pack. He only had one word to describe the difference, "amazing". I'm convinced that Banks products do produce noticeable gains in performance. If you don't see those noticeable gains, then there is something wrong with the install or the state of tune on you RV.
As for "is it worth it". That's a silly question. All boy toys are worth it. GRIN
Richard
460 w/Banks Power Pack