Working for FLHH and being fortunate I suppose to work with these loco's they are a very good piece of kit I have only been on the class when they have worked coal trains or being light loco but to compared to a 66 or a 60 these locomotives are in a different league to Haul a 1,900 ton coal train over the S&C and only use a minimum amount of sand is something a class 66 can not do and something 60 would struggle to do.
I have never been on freight train that has started away from Birtley Jn (Tyne Yard) and be shutting off power at Chester le Street as the train is up to line speed, on a 66/60 you are lucky if you are around the 35/40mph mark the faults with these locomotives are daft little faults that can only really be sorted with a fitter who has a laptop computer! The high oil temperature fault that was causing the class to fail when they was 1st introduced has been resolved with re positioning of a sensor and better lagging on a pipe and also the disposal procedure of the loco has been revised this to is stopping the flat batteries that was always occurring when a loco was stabled.
Comfort wise the class has the best seats that could be fitted to any locomotive there ride is a bit dodgy at times the best way to describe it is bouncy when you hit a wet spot you bounce around for around a mile after but that is something that will be worked on the ride quality saying that is far better than any other class of loco I've worked on, far better than 47/56/58/60 or 66.
Stationmaster I do think you are being a bit hard on the class 60s I know you was involved with there introduction on the WR with the stone traffic out of the Mendips but for a loco that designed and built within 13 months and build that rushed I think they have done a sterling job and to be fair with only the 1st member of the class having a no doubt cheap overhaul at Toton as I type this I dn't think they have done that bad a job really. In the Yorkshire/Humber area for instance when they was put on the heaviest trains out of Lindsey and Humber Oil Refinery's in 1990/91 and handled these trains with the greatest of ease Trainload freight increased the weight's to 3,000ton and the only thing that stopped Trainload Freight increasing the loads further was that the terminals could handle the length of the trains, But you are right they are still no match for a 59.