Had mine delivered and got it set up to control the following
Samsung Smart TV
Sky HD
Sony Amp
Roku box (this was always a nuisance as the IR sensor is very directional and always needed a perfectly aimed controller to operate, but the Harmony allows control via WiFi so no line of site required).
PS3
PS4
Wii U
XBox One
The IR Blaster is fantastic, I haven't been able to plug it in behind the TV unit yet so it is sitting in the corner of the room and is still able to control all IR devices from 3 meters away at a 15 degree angle from the equipment!
Eventual plan is for a new TV unit, so the two addon IR extenders will be able to control stuff in the two closed units at the end and the blaster will control the main (Sky and Amp) in the middle section.
Very happy as wanted one for ages, but couldn't justify the over £100 cost it always seemed to be before.