The 304s were great. Always nice and warm in winter. I rode on them a lot, along with 310s, which were also nice units but in a different way, on local trains in the West Midlands. The 304s were lively to say the least. I remember travelling in one from Manchester to Birmingham, which was deputising for an Inter City train on a Sunday afternoon in the early 90s, and was bounced all the way to New Street. Very dimly lit, you noticed it more at night obviously, quite a contrast to the glare of fluorescent lights in other trains. The only thing that I didn't like was travelling in them late at night, because they were non gangwayed, so if you were having problems, you were stuck in that carriage, unlike the 310s, which were semi gangwayed up to refurb, and then gangwayed throughout each set. They certainly had character.