I thought Liz was a great teacher. She's really enthusiastic and made UWriting at least bearable if not enjoyable. She's fairly young and relates to her students pretty well. She remembers a lot of tidbits about everyone in the class and will make sure to chat with you. Overall she's a really positive person - she just wants people to participate in class, even if you say something wrong.
There was a LOT of reading, but this seems like the norm for all UWriting classes. Make sure you do the reading, because the essays are based off of them. I made the mistake of glossing over a lot of the readings, and I had to go back and read them thoroughly because I had trouble writing my formal drafts.
One gripe was that her exercises could take a long time to complete. However, they're graded for completion and could help you write the essays so it wasn't too bad. Also, a lot of the class discussions were based on these exercises so if you didn't do them you were kind of lost.
I thought Liz was a fair grader on the essays. I got B+/A-s on pretty much all of the them, which seemed about right. I'm sure if I had put in more effort I could have done even better. She has mandatory conferences for every essay, and it's really important that you go in there with some good questions because she gives you solid feedback and is very clear on her expectations. She will also write about a page of comments/feedback for every formal draft (ungraded) that you turn in, and again she'll make her expectations very clear. She'll remember what advice she gave, too, so be sure to fix whatever she tells you to because she'll notice the improvement.
Most of all, I have to say that my writing truly improved after taking this class. Don't just do it for the grade - pay attention to what is being taught. She pointed out a lot of flaws in my writing that my teachers/peers had never commented on before.
She's also pretty attractive so that made the morning trudge to class a little more bearable.