Floating schedule- you almost never have the same days off, you can never plan anything outside of work in advance because you never know what your schedule will be
Next to impossible to get days off- once one worker picks a day to use for vacation or PTO, none of the other workers can pick that day. You literally have to plan your entire year in January or else you won't get the days off you want.
Sick policy- there are no excused absences, if you call in sick you will receive a point. Points do not roll off until a year from the day they're received. Once you have four points you are on grounds to be disciplined, regardless of what your absences were for
No weekends off- I worked at AT&T for 2 years and probably had 5 Sundays off the whole time. At most.