We have just finished our first room with 15 Ncomputing clients in it. We have them running off of two dual core workstations running windows xp. the maximum users at a time for windows xp is 10 per host. We use insight to monitor the students and with a little work we had it up and running just fine with the clients. With these low performance workstations i was still able to have 7 clients watching youtube videos at the same time. The Processors were maxed but never crashed. After about 7 the video started to be a little slugish, but still didnt crash. We are very happy with the performance of the Ncomputing clients even though there is not a lot of documentation on them. we just ordered a few servers to run ESXI on and run multiple instances of Windows 7 and XP on. and about 50 more Ncomputing clients.