They are a cracking piece of kit used in the correct enviroment, however mis treat them at your peril.
If your working on a building site it doesn't take long for the reel to get full of sh1t when you keep throwing them on the floor etc.
One good safety aspect is you don't need to wrap them round yourself when not in use, just under the arm they go.
They will also last longer (if looked after) as 90% of the strap is hidden from the elements when not in using leading to less snagging, abrasions and contamination.
Miller mini lite, we wear 2 reels, they weigh 1.1 kg + shark hook and triple lock caribeener.
Works well in 100% hook on, lanyard goes out 2 m and has a shock absorber.
Protecta make another 1, call it a rebel, 3.3 m retractable bit.
Anchor Points: Jordan Clamp where there is no adequate anchor point with in the close proximity of the work place a Jordan Clamp maybe a consideration.
I personalty have slight reservation, if partial or complete collapse of the Scaffold were to occur when a Scaffolders is " hooked on " the Scaff way go with the Scaffold, however, Risk Analysis and Adequate Engineering may mitigate this.
Comments please ???