Well I got my Zenith in the friday before Christmas and have not found anything bad to say about it. I was running a 450 before and I loved it but the Zenith kicks the 450 in the teeth. My 450 took around 14 min. to fill 5 gal. to 160 psi. and the Air-Zenith 0-200 in just under 7 min. Also it is actually quieter than the 450. I had my 450 on my frame under the passenger side cab and the Zenith is in the bed behind the driver's side. I mounted it to a piece of 1x6 pine board that is coated with some rubberized undercoating and bolted directly to my bed floor. I got the December special from Suicide Doors and I received my package on the day that jason said it would be shipped. How the hell did they pull that off !!!!!!!Sorry this post is so long but I had to share. Also watch out for Cancer Cruz 06 flyers. I will be working on the design next week. Just waiting on a few more sponsors to get back to me.