
I have a Royal Supreme - paid a fiver for it twenty odd years ago - and mine is certainly free-running enough for most trotting situations, though it is more suitable for bigger, more powerful rivers like the Avon. In these situations it is better than many of the lighter reels available.
One big advantage over the Purist and similar models is that, once you give it a good 'bat' at the end of the trot, the momentum of the heavier drum keeps it spinning longer and speeds up the retrieve process. Of course, this extra weight is a disadvantage when using light float tackle in slow moving water.
The adjustable drag mechanism is a useful refinement over the ordinary 'Supreme' (the 'Royal' suffix denotes the presence of this feature on G&Y reels) as it allows the spool to be tightened up enough to prevent it backwinding when legering in a strong current.
The only reel I have which will beat it on fast rivers is a pre-war four-inch Allcock Aerial Popular, and these are becoming increasingly expensive.