Well, they're Super-duper Voyagers, if I can put it that way. The seating layout is better, the luggage racks were bigger from the off, the plumbing was modified. Basically, lessons learnt from the 220s/221s were applied here. And they're better-looking.
They are still an unsuitably underfloor engined intercity unit with a too-narrow body profile for designed for tilting. Yes, they are better than a Voyager, but still not better than a 30 year old HST.