I think that existing teachers feel the need to jump on a thread like this because teaching is a profession where the general public perception of the job (lots of teachers needed, short hours, long holidays, family friendly) is at odds with the reality (ferocious job competition, long but somewhat flexible hours, long holidays full of planning, and family friendly only during holiday time).
It is a great job IF it is your vocation. Many of the 'less lovely' parts of the job will vary depending on what school you are in - details like whether heads insist on all planning being handed in in advance, the 'presenteeism' culture, the nature of the curriculum (creative curriculum vs QCA units, maths textbooks vs individual planning), the nature of the intake, the character of the head etc are school dependent and make a huge difference.
If the OP is drawn to teaching despite all that we say, has shadowed a teacher in class for a while (even better, worked for some time as a volunteer or TA in school) and finds herself excited at the prospect of running the class, has taked in depth to the PGCE provider about employment statistics etc then it will be the career for her. If she has had fluffier ideas about teaching, looks at the thread and thinks 'maybe it's not quite as I was expecting', goes into school and isn't excited by it, then it isn't the career for her.
(Ninah, apologies for the ill-thought-out comment about partners. I should have said 'partner or childcare or relatives'....whoever it is who is going to look after your child on the second day of their illness, because while a school will let you take leave of absence on the first day in an emergency they NEED you back on the second)