AHHHHHHHHhhhh!!! the rumble seats here!!
its fantastic quality,i thought it would be more flimsy,and,well,poorer quality than the rest of the vista, like some other 2nd seats ive had but it just isnt,the fabric and the padding is lovley,the hood is silver (uv?) lined so its nice and thick for the windy winter ahead,no drafts here!
DD fits nicely,is still under the weight limit,but in all honesty its very sturdy looking anyway.
and best of all IT FITS IN THE BASKET!!!
and the basket STILL has room underneath it for:
my hobo sack changing bag (nearly full)
DD's pre school backpack (full with a change of clothes and a soft toy and a colouring book and pens)
DD's thick winter coat
DS's jojo polertec
3X wooly hats
AND SPACE TOO SPARE!! 
(DS has just woken up so will go and try them both in it now)