Use both on my commuter bikes. The IGH layout is cleaner and easier to put a chain case on (with fenders you get less road grime - than deraileur). For my uses a 1 x 8 or 9 (10 even) deraileur set up is optimal, much of the simplicity of Hub, no FD takes away a lot of deraileur issues. I've run a pretty slush covered RD with good reliability. A 12-36 nine speed cassette provides a good gear range.