Its an exceptional case and really improves the ergonomics of the phone making it much easier to hold onto the slippery thing! The IR function remains working which is done using a clear power button extender through the case. Draco have spent considerable time making the volume rocker work perfectly and the entire thing feels very well put together (the spare screws in the box really help to!)
I have measured a 4% loss in signal strength which is barely noticeable but i would still recommend this highly to anyone.
I do think it would be good if mobile fun stocked a spare screw set and screwdriver just in case though!