How bad is the Panasonic Lumix DMC-TZ3K image quality under low light?

I need my camera to be a compact (semi-compact) high zoom camera, which uses a Li-ion battery. The Panasonic Lumix DMC-TZ3K seems like the best deal, but I have heard about it having a not so good image quality under low light. I also have a casio z500 (i think) which has a terrible quality under low light.