Experiences of Quetiapine (Seroquel) for sleeping

Ho everyone,
I have been suffering from insomnia for many years. Clonazepam used to help me sleep, but now even though I take 3mg before bedtime I struggle to stay asleep for more than 3 hours and when I wake up I keep tossing and turning. My doctor prescribed zolpidem 10mg but it doesn't help either unfortunately. I'm also on Venlafaxine XL 150 mg and now the doctor suggested that I take 25/50 mg of Quetiapine before bed time to help with sleep and I should also get some positive effects on my depression as well.
Has anyone ever tried Quetiapine at these doses? If so, what was your experience? I would really appreciate hearing from those who tried it, it would mean a lot to me. I am always a bit scared to try new medications so hearing others' experience can help.
Thank you