Yup, I got a load of the big tubs of white matt interior paint Woodies brand - I have still to return most of them - rubbish.
I was told by a painter/decorator friend not to use it and to buy "proper" paint but of course, I knew better.
In the end, I went and bought the "proper" stuff. Lesson learned.
What I noticed was, the Woodies paint needed about twice as many coats as the good stuff - even more in some places. Maybe it worked out cheaper but it was a hell of a lot more work - I've to paint the outside walls (when theres some dry weather) and you can be sure I wont be buying the cheap stuff this time.