I'm a secondary science teacher. I have done a PhD and a PGCE, the PhD was easier.
Teaching is very rewarding but the PGCE year is very hard, NQT year is a little easier, by year 3 I wasn't finding it too bad. However just when you thing you've got things sorted so holidays can actually be holidays the goal posts change, like new GCSE grades with no guidelines or new curriculums etc.
I haven't met one child I genuinely disliked but there have been several parents. You wouldn't believe how nasty and rude some are.
I work in a nice school but have had bruises from things being thrown at me by children.
I work from 8-5 most days. During my PGCE year I worked every evening, weekend and at least 50% of the holidays. During NQT I worked a couple of evenings a week and one days at the weekend, plus 50% of holidays. Year 3 I just worked one day at weekend and probably 25% holidays.
Things I didn't think about were open evenings/parents evenings/ progress evenings. I have one nearly every other week as year groups are so big that they are split over two different evenings. This is working until 8pm for parents evening and 9pm for open evening.
Pay is easy to find out. You start at M1, just google it.
Hope that helps 