On 1.5, it was slow as molasses. I updated her to the latest 2.1 leak, and it got better, but still really slow compared to her iPhone she was accustomed to. Finally, I turned off Sense and gave her the vanilla Android experience...and she is much happier. I wish there was a way to overclock the Eris like there is the Droid. It's really not making a good first impression on her as an iPhone replacement