im sure i posted a reply to this yesterday, but its not here now!!
so i will try again.
I have been running a pc to control all my lights (quite a few) for about 18 months now with no problems.
A friend of mine brought the martin version and has had nothing but trouble and it cost him over £1000, so when i showed him the software i use then told him it was only about £300 he was gutted,and has since brought the same !
You can download the software for free the only part you need to pay for is the dongle (i have not posted the web address or name as i dont want another telling off

, if i am allowed o i will do).
the most important thing i have found it for it i can hire extra lighting when i need it, for band setups or anything like that and in 15-30 mins have it all programed in to the pc and running as part of the show or have a dedicated band button, this is also usefull with smike machines or the low fog (dry ice) which i have also hired and used (never again!!)
if you want to ask any questions or if your near my neck of the woods and would like to see it running im sure it could be arranged.