I do about 50/50, I have a zachlift on my Holmes and a zach fifth wheeler so I'm familiar with an independent underlift. I understand the advantages of the integrated for weight distribution and I do some crazy heavy tows occasionally. I really like the concept of the NRC seems very versatile, kind of best of both worlds but finding one like what i want in my price range is tough and they don't seem super popular not sure why. I've found several 50 ton centurys and vulcans that fit the bill for me just trying to find out the difference between the lift pivoting on the boom verses solid, I've asked salesmen and the jus say their brand is better with no explanation. cant believe miller would put that much extra work and fabrication into the pivot without a good reason. Curious to here from operators as to why? As far as preference i have none as i have never operated an integrated other than on a one ton wrecker. One thing that intrigues me on the integrated is lift height, I watched a miller promotional video on using the fifth wheel adapter flipped over with a king pin to hook up to a kw 8 bag, seemed really easy and two of my large clients run all kw and i do quite a few swaps for them.