We have 40 of these installed, the staff are getting on with them great, we have a pc bypass connected and an audio. We have fixed pc's in every room, this means the projector does not have to be on to display on the screen and play audio. The pens work well with the Smart software.
The only issue we have found, bright sun light. This can stop the pens from working and also the auto calibrate. Apart from that they are a good bit of kit.
The Epson projector tool for the network is really handy as well. We can set times for on and off, as well as fault find for each room without leaving the office.