I've booked online and its easy. You go through the itv with the vehicle. The whole things like a production line. The guys are very helpful and never seems to get exasperated if you can't understand what they're saying. I approve of the system on the whole. They don't do any of the repair work so have no reason to find extra faults. You have 14 days from a fail to get any problems sorted and then it's back for a parcel test(they just ascertain the fail problem/s are sorted and give you your certificate stamp. Have fun.
Bruixot