I'm a sw and what people say about the hours are true - some weeks you may leave on time others could be another 30 hours.
It's also not a 9-5 mon-fri anymore as I'm aware of one la who have changed all contracts to 7 days a week!
You wouldn't enter sw for the pay/hours/working conditions. Pay can start as low as 20k and tbh although the media always say 30k I don't know a newly qualified who earns that.
Depends what you want to do in sw as the jobs vary so much