I love this lens - it was worth every penny. Indoors I flip on the lights and never use a flash. Very sharp, nice bokeh, almost nothing I can gripe about.
The only downside is that it tends to hunt for focus a bit at low f-stops (below f/1.8), particulary at f/1.4. I tend to shoot f/1.8-f/2.5 and ISO400-800 with it, so it's fine with me.