I live in Stalybridge and I've increasingly been getting the train again - I use Northern services as I often take a bicycle into Manchester and can't commit to a specific train (thanks TPE).
Trains are generally punctual, I've had no issues there, but the Stalybridge-Manchester Victoria shuttle hasn't been reimplemented yet so there's only 1tph to Victoria, vice a half hourly service, and sometimes it's a single 150 which can be cramped - I think theres a timetable change on the horizon but it's far too late coming.
No issues with staff but I think it's a bit odd that you never staff passing through the train want to check tickets or just sell them...
The uniforms do look a bit like something from a kids TV show.
Publicity of some services to be run by RRBs is pretty bad - it's buried deep in Northern's website and is inherently difficult to find, and if you do find it it's usually a copy of an internal document, that's a dense table full of abbreviations like so and sx but without a key to them. Trying to feed back to Northern about this is pointless, they seem to be of the opinion of 'the information is there, we told you, we won't do any more'.
Anyone who thinks the 150 refurbs are of reasonable quality is mental IMO, low quality paint and a terrible choice of colour that easily scuffs and scratches and lazily done with minimal prep work - seats with loose bases, missing screws and loose interior trim painted over and ignored, badly masked off windows with overspray on them, carpet falling off the walls, etc. They just yanked the seats out, went in with a compressor and some cheap paint, threw everything back together and called it 'refurbishment'. It didn't even need doing IMO.
There was also the farce with the seat moquette - another red flag they were cheaping out.
Don't get me started on the livery as this isn't the place.
I think it's just business as usual at Northern. They do some daft and questionable stuff, revenue is dire, there's loads of room for improvement across the board, and everything feels cheap, but at the end of the day it more or less works.