I have one of Simon's pedal locks, I bought it at Newbury second hand but unfitted, probably due to the fact the PO hadn't assembled it correctly. My gain great bargain, excellent peice of kit. This new lock system may be very effective but for that money you can get a number of other systems that will be a greater inconvenience or even pay for a gps location system. It would also pay for an extremely good quality chain and padlock to the nearest lampost. The old idea of leaving a cylinder head on the seat I think is probably just as effective.