Houiller?? He's Technical Director or something for the National team right?
I wrote this on Le Guen in the Inter Milan Thread
He was a very good holding midfielder so that can give you an idea as to how he thinks. With the right players (ie: when he coached Lyon), the play was brilliant. He’s methodical, organized and rather cerebral. He’s not a fiery leader, who’ll throw his shoe at a ref. I would say he doesn't have a style and adapts style of play to the players he has.
One thing he did do is bring up guys from the younger programs which was refreshing. A guy like N’Gog got his shot with Le Guen and was picked up by Liverpool or MU can’t remember. So if you have promising youngsters he won't hesitate to give them a shot.
I wouldn’t call him a disciplinarian, it’s just guys who step out of line get sanctioned which I find normal. They go play for a game or 2 with the reserve team. Guys who don’t perform, sit. He stands by his guys when things go wrong, and doesn’t throw them under the bus.
Another perspective is from Makelele. He just came out with his autobiography, he said Le Guen was a ‘good’ coach. Not great, just good. He’s had better.
Ah and another thing which might come in handy for Istanbul, I find he handles media pressure very well. Calm, cool and collect. After the sh*t he went through here last year, it was rather amazing how he handled press conferences.
In conclusion, you'll probably find him boring as a person.