I had a ride on 150124 today, the first time I have been on one of the ex FGW units. It has been refurbished and was on the Blackpool South route. It was interesting to make a comparison with 150205, on the opposite turn, which has had partial refurbishment.
124 has seats in the new Northern moquette and a full repaint inside and out. I stand to be corrected on this, but I think the seats are the FGW Richmond ones reupholstered. Rather against the tide of opinion on this forum, I found the seats comfortable and well sprung, if rather small. The low backs give a feeling of space and light, and when clean, as it was, the white paint enhances this.
205 has the FNW Chapman seats still with the old Northern moquette. The backs are high and painted black with large yellow grab handles.
In my opinion, there was an easy winner. The main advantage of the ex FGW unit was the bright atmosphere created by the low back seats, and to a lesser degree (this is a matter of preference), better and more comfortable seats.
I was told in October that 150s were to get seats ex 156/158 when they in turn get new seats, but this clearly cannot happen yet, so it seems refurbishments are going ahead using existing seat frames. I think the work on 150124 is perfectly satisfactory for the duties they will perform, given that as 142/144s disappear, the 150 duties will be more local than now.