While some individuals prefer to have a managed and well-organised work schedule, others consider it as a pointless thing, and are more willing to have flexible working hours. There are both, benefits and downsides of these options, but I believe that a flexible work schedule is more suitable in various situations.
First of all, the flexible schedule gives you more freedom since you can organise your day more precisely. Consequently, it enables you to enjoy your time off in a better way. You are less stressed about your strict work schedule. Secondly, you may be more productive in your job, because you can adjust working hours to your own preference. Not everyone is an early bird, and the majority of people do not prefer to wake up in the morning hours. If individuals are forced to work in non-compliant hours, it is inevitable that their work is less efficient. Everyone know for themselves when is the best time to take a break, and rest from their job.
On the other hand, established work schedule has some advantages. For some individuals, it may be helpful and beneficial to have set working hours. They prefer to fall in a routine and to their stuff as a daily grind. Secondly, they are gradually getting used to their planned working hours, and even a small change may cause chaos in their life.
To conclude, I believe that it is an individual topic, and everybody should decide on their own. From my perspective, it would be easier and more convenient to adjust working hours by myself. It opens more opportunities for hobbies and leisure activities.