Since the advent of modern Loch Style techniques, a fly line that has the ability to fish and present your flies just under the surface of the water has been a must. The Hoverer has the ability to hold your flies in the zone for far longer, thanks to its very slow sink rate.
For effective nymphing and presenting lures sub-surface, this line takes some beating. The fact you can retreive a lure on a level plane, which most fish find irresistible, makes this line really stand out from the crowd. From the top of the water to the bottom, if you're nymphing or pulling lurs, and whether you choose to fish from the boat or the bank, you need this line.
Distance taper with a super-slow 1in per second sink rate.