I have one
Seems really solid, have it bolted through the upright on the shed and nothing would remove it short of pulling down the shed
Piece of P*ss to install – just make sure you get it at right height and you have a chain long enough
Instructions indicate installing under a window so you can put the horizontal cross brace at the window level – I wouldnt then thieves can see you pride and joy. Mine is at opp corner of shed so someone looking through window cant see the bikes
Tidy job from the outside too, domed bolt heads countersink into the soft shed timber, I just creosoted over them when I did the shed and you would have to look hard to notice anything
I sent details to my insurance company and they where happy that it satisfyed their 'must be locked to immovable object' criteria for bikes stored in outbuildings
Fortunately it has not been tested in anger yet though
Is combined with a rape alarm rigged up to the shed door and 3 padlocks on the door
Of course a determined thief will get through pretty much anything but I would hope this delayed them long enough to put them off
Think there is a review and article on shed security on BikeRadar