Ive only brewed 5 beers total, so take this with a grain of salt but Ive absolutely loved the floating dip tube in the fermenter and have had no issues with transfer to keg. Just transferred my 4th beer today to a keg. I think the key to the floating dip tube systems are to make sure you have a solid cold crash to flatten hops,trub,dry hops prior to transfer. Ive gotten down to 38-40 degrees for all 4 of my beers prior to kegging and transferring has been a breeze. I do a gravity transfer. After setting both the fermenter and serving keg to 5PSI, and hook gas post to gas post - and liquid to liquid, it transfers very gently but admittedly it is slow (~45min-90min). I actually haven't put slits into the bottom of the dip tube yet which would likely speed the process up, but Ive found that the floating dip tube can suck pretty much all the beer in the fermenter with little waste because the longer dip tube length allows the floating dip tube to lay down on the trub rather than penetrate it. And it doesn't really suck much hop particulate at all into the keg. I took some pics of my kegging transfer today to show a friend just how much I can get out of the fermenter and not leave much liquid behind. Using the same methods, I also took a pic of the first keg Ive kicked to show very little (if at all) hop debris in the empty keg. Took to quick squishes with warm water to rinse it clean easily prior to doing the PBW clean.
FWIW: for my current setup, the fermenter never moves with wort/beer in it which liklely helps with flattening the debris to bottom. I roll my all-in-one foundry over to the fermenter and pump the wort in and pitch. Then when transferring I bring the keg to the fermenter. The first gravity transfer I tried I made the mistake of tilting the fermonster because it looked the dip tube was close to the dry hops at bottom and didn’t want to clog a poppet. But tilting it only disturbed the dry hops making a murky mess out of it and transferring less to keg than I anticipated. Ever since, I just let the dip tube lay on the trub/hop cake and since it’s a slow sucking/siphon action, I get no debris in keg and get nearly all liquid out easily as seen in pictures