View attachment 53693 Although I know not everyone will agree, I do think fainsa seating can be comfortable when it has armrests (eg. 377s) When it doesn't have any armrests like on the 700s, they become much more uncomfortable because they're so slim and don't have a space in-between so your cramped with the person next to you.
The picture is of a pair of seats on a southeastern 375 I'm currently on, they do have a gap in between them so when you are sitting next to someone, you do have some space. The 455s have this gap but my guess is that the 701s seats will be squashed together which for the journey length these trains will have may be worse than the padding of the seats themselves.
At least Aventura's don't have intrusive heating so people sitting by the window will actually have somewhere to place their feet.
After travelling on a 345 today, Im impressed with acceleration, it felt more like the tube. I really do hope 701s will be as slick and accelerate as quick as the 345s, that could cut journey times by a bit.