I am a secondary school teacher, but echo everything Custard says.
Teaching is a fantastic profession. It is very difficult to beat the sense of achievement, pride and 'a job well done' you feel when you see your teaching making a difference to the children in your care. Personally, I could never go back to an office job again (I was a manager in the music industry for 10 years prior to retraining).
However, I do not believe it is a good option for anyone wishing for a role that will allow them more time with their children, or that is free from pressure. The hours can be long. In my school, we are all in before 8am (I am in just after 7am), with some leaving by 4pm (but inevitably bringing work home) and others (the majority) staying on after 5pm. My school will allow parents maybe one day a term off to make appointments with their own childrens schools. I have been to just one school play since I started teaching 5 years ago 
The workload is enormous - in secondary schools, the assessment/marking load is particularly fierce - and evenings and weekends are often taken up with this, and of course planning (which I am sure is the same for primary teachers). I am not over-egging it when I say - teaching is a job that you take home with you, if you are passionate about it, and this can be tough on work-life balance.
My honest opinion is that if you can afford it, anyone considering doing a PGCE should spend at least 6 months as a teaching assistant, where they can get a genuine feel for the classroom, the role of the teacher and what is required, and whether or not they could do it, day in, day out, and still enjoy it. Is that a possibility for you? Bear in mind that TA work is very poorly paid, but I do believe there is NO better preparation for teacher training than working in a school.