I am currently on 350mg of Seroquel XR - I have been on this medication at different doses for quite a while now. The experience is mostly positive.

POSITIVE:

-Helps me to maintain a regular sleep cycle
-Helps with anxiety
-Helps with any possible psychotic symptoms that can come with manic episode

NEGATIVE:

-Depending on dosage in the past, I would sleep too much (14-16 hours per day)
-Even after a huge amount of sleep, would feel groggy and unmotivated

My highest dose of the Seroquel XR was 600mg, and it was too much. I am currently fine with the 350mg. I typically sleep 9-12 hours a day, which is fine with me. Usually 9 hours though!

I hope you find this medication to be helpful.