They have good coffee, and beer too, hehe!
It's a great place, really! Stage is big enough for bands with 5 or 6 members, and 70-100 cm high. Both PA and FOH are state of the art and do a good job, as well as the engineer does. I miss a little precision when it comes to muliple note box barrage, but it's quite ok. I can't tell you about the monitoring because I've never been up there on stage.
But I don't think you have a place where you can escape those crazy prog freaks who travel to a little sleepy Dutch town instead of having an out of season vacation at Teneriffa.
If you need any specific information, don't hesitate asking Rene, or any of his staff. (I'm just one of the aforementioned)