Any business is going to have dissatisfied customers, because their are times when the workshop screws the customer around, other times the customer just expects too much, in too little time, for too little money (or a combination) so theres often a difference of opinion.
I certainly didn't set out to give 101 a bad rep by starting this topic, but from what i can read more people have said they liked the service and work done than those that didn't, if you count those who have dealt directly with them.. not hangers on who have a mate of a mate that had problems.
As for ecu locking i agree with it, how many times would a customer think they know their car better than the tuner, and go in and fiddle with the tune to 'squeeze' a bit more power out, only to cause damage to the motor (say through excessive knock, leaning out etc..) then take it back to the workshop complaining that it was the tuners fault for supplying a unsafe tune or something.
I think owners need to be given the choice of a ecu lock, or leave the ecu unlocked and the customer signs a waver saying that they accept full responsibility for any future problems encountered with the tune on their car, this could be done when you book your car in to get the tune done.
My 2 cents..