I personally like the IS as that it definitely comes in handy when your speeding through some rough waters. I can only speak for myself but I've had my GTX IS 255 Ltd for about 2 months now and I love it. I definitely dont feel worn down and beatin up after riding all day, but this I will tell you. I switched out for a Kawi and a Yamaha for a day with some friends and man I was done. Yes, I would tend to agree the more gadgets the more exspensive its gonna be and definitely going to cost more money maintenance wise, but when its all said and done...I'm out on the water more than those that don't have the IS, I could be wrong as thats just my perception, but based on riding with some friends week in and week out, I'm last one saying its time to go home....I love it...