O.K., saw my name mentioned. LOL . . . When I owned my CK20 gear. I ran the 49" Coroni as the 59" would have really worked the little guy with the kinds of fields I mow and none of it much shorter than 4' and some so tall that I had to stand up just to see where I was going but the mower still handled it although it was in 2nd and some times 1st gear.
So when I traded in my 20 for the 30, I sold the 49" to a vinyard guy who converted it to hydralic drive for his skid steer and I bought the 59" (TL1500)and have been mowing a vast majority of jobs with it because I can get in tight areas and manuver it better than the 60" rotary and my customers like the finish look better. Also it's great on those "blind" mowing jobs where you find all kinds of trash.
As you know, the 49" (TL1200) has 72 blades and the 59" has 88 which means there's a whole lot of cutting going on there so your best results will be with a slow speed in very tall grass, where most flails have anywhere from 54 to 64 "Y" blades on a 60" rotor. Also the Coroni's throw the cut grass ahead of the rear roller which means you don't get things thrown out the back which can hit other things/people as opposed to the "big dollar" flials that kick the cuttings out after the roller and need some sort of guard.
I have gone thru two sets of belts, one set my fault trying to mow tall green grass too fast which caused it to wrap around the rotor before it could be re-cut and lite the belts up! the other set came apart due to grease getting on them, a set of blades due to finding those pier blocks in that over grown field where the chicken coop used to be!! But if I distroy my Coroni I won't feel too bad as I can buy two of them for price of just one of the "others".
All in all, I like it and I use it for stuff that they probably weren't really designed for! Oh, and FYI, TSC also sells Coroni flails.