I bought a "24" 550,my first impression was this thing is noisy,jerky,slow....But after 30 miles i changed the filter and oil to Mobil 1,immediate difference in engine noise,by the time i hit 40ish miles the belt had worn in and alot of the jerkyness stopped on takeoff,and running in low over bumps i was fighting the weak accelerator spring trying to hold steady rpm's so i put a stiffer spring 100% better and use only 93 octane it does not run well on 87.One problem with cabin noise is your sitting on the engine and its inside a big plastic hollow box that amplifies the sound,my next step is to add sound mat inside the box,So at 9k thats about right i paid almost 11k for mine new,bottom line is my father in law likes it over his honda pioneer 700,has more room and independent suspension,adjustable shocks,larger bed,with only 50miles on mine i cant say much on life of the machine but so far im liking it