tl;dr: I agree that the ChaoticLab CNC Tap should not be purchased, at least not the current version of it.
The problem with ChaoticLab, from my perspective, mostly stems from the 'chaotic' customer support users are receiving from the company. One staff member will tell users that the Tap should absolutely not be disassembled at all for any reason and that the rail does not need any added grease, while another staff member will tell users that you should absolutely clean the rail and grease it but still that you should do this without disassembling it (which, in my honest opinion, is simply not effective). And these two staff members appear to work opposite hours from each other, so the answer you receive will bounce back and forth depending on the time of day. I have myself experienced this in their Discord, and watched it happen to others as well.
My personal experience is that I had to completely disassemble the CL CNC Tap to properly clean it, and even got some metal shavings to come out of it. ChaoticLab assured me that this was impossible and that what I saw come out were bearings, but I'd like to think that it is fairly easy to tell the difference between a flat sliver of metal and a round ball (as tiny as it may be).
After I cleaned and greased it, the CL CNC Tap felt a LOT better. I don't have a lot of hours on it yet, but it has not developed any side-to-side slop for me as of yet. I should note that when reassembling it, I did add blue threadlocker to every screw to hopefully avoid some of the issues other users were reporting.