I left in part because I was working 80hrs a week, I was continually on call, I was exhausted, utterly burned out and stressed. The money could not make up for it. I had no personal life, constantly cancelled on friends and family, suffered SAD every winter due to lack of sunlight, worked through all my days off and I was a DC, not a senior rank.
The reason they opened direct entry to DC is because uniform PC colleagues (no such thing as "just" a PC FFS) have no desire to make the move sideways as they are also burning out under marginally fewer hours but similar stress due to the cuts on all fronts.
My old CID office have had to cope with a long term sickness absence rate of 50% of its workforce for the last 3 years. 50%!!!! Can you imagine the stress levels in those teams?
Is an amazing job, I loved it and I miss it almost every day for years later but I'll never recommend it, especially never in Direct Entry. Be a PC first, learn the tools of the trade, learn your patch and the people who live in it, your craft, your people skills, how to roll in the gutter having a punch up on a Friday night with the scumbags who want to kill you, how to talk to them civilly after you've nicked them, how to console and comfort victims of crime in their worst moments, how to laugh again after you've seen the most horrific scenarios of people's lives, how to come home and not bring the horror home with you. Then become a Detective if you still want to. Your may prefer life in a uniform.