For those with transport, this walk can be started from Kinlochleven or the Kingshouse Hotel. For those without, you could leave the train at either Rannoch Station or Corrour Station.
Most of the route follows good paths, a couple of sections covers part of the West Highland Way and the walk by the shores of Loch Etive is especially beautiful when the sun shines.
The way between Blackwater Reservoir and Corrour Station is a chance for solitude and the same can be said for Rannoch to Kingshouse.
Overall, this is an excellent walk through varied terrain; highly recommended and there are some perfect spots for wild camping.