Just that really. When we first claimed it was hell, we were a test case in our area and nobody seemed to know what they were doing. It took 8 weeks for our first payment, which was awful obviously but our landlord and local authority were very understanding and made it as easy as possible for us (we were allowed to pay £5 a week rent until our first payment came through, and no council tax. Obviously, when our backdated payment finally came through we paid off arrears)
But since then, it's been a breeze. DH and I have both changed jobs, had differences in income and therefore differences in monthly UC payments. We've moved house, and the children have changed schools but throughout it all, our payments have been reliable. We don't have to inform them if our monthly wage goes up or down it's all done through HMRC.
I can't speak for how well it works if you're self employed, both unemployed or a single parent, because I haven't experienced that. I've been unemployed with DH in work, and there was no requirement for me to look for work unless I wanted to due to his earnings, which takes the pressure off significantly.
So AIBU to think that if you're a low to middle earner, UC works well? The rollout has been horrendous, yes, and that needs fixing. But once it's all settled, it's by far a better system than tax credits ever was.
I'm ready for a lot of negativity, because that seems to be the norm, but I'd be interested to hear from anyone else with a positive thing to say about it. For the record, I'm a Labour voter and die hard socialist, so it pains me to be completely on board with it. But there we go.